A recurring pattern across the AER country research is the structural opacity of nationality-disaggregated data in jurisdictions where the data manifestly exists internally. It is distinguishable from the simpler case in which a country lacks the administrative capacity to disaggregate by nationality. The data-wall pattern is administrative capacity that exists — and produces non-publication.
The Gulf is the most concentrated regional expression of the pattern. Kuwait, Oman, and the United Arab Emirates each operate a residence-permit and labour-market administration that enumerates foreign nationals by nationality for visa-management and security purposes — Kuwait's Public Authority of Manpower, the Royal Oman Police's Directorate General of Passports and Residence, the UAE's Federal Authority for Identity, Citizenship, Customs and Port Security — and none of them publishes that enumeration at the level of nationality detail at which it manifestly exists. Published Gulf data on foreign workers and residents typically appears as a top-five or top-ten of source nationalities, dominated by the Asian and Arab source countries (India, Pakistan, Bangladesh, the Philippines, Egypt, Jordan); the United States falls into "Other" categories with no disaggregation.
The cumulative effect is that the substantial U.S. corporate, oil-and-gas, and military expatriate presence in the Gulf — plausibly on the order of 50,000 to 80,000 across Bahrain, Kuwait, Oman, the UAE, and Saudi Arabia — is not enumerated in any host-country dataset the research could locate, beyond a single census reference figure for Saudi Arabia.
Bahrain: the limit case
Bahrain carries a composite Data Transparency score of 0.0 — a structural absence across all five kinds of official publication the index looks for. No Bahraini official source publishes U.S.-disaggregated data on the resident population, migration flows, naturalizations, or work permits. The closest available proxy is the 2020 Census "North American" nationality group: 16,415 individuals — a regional aggregate that does not separate U.S. citizens from Canadians.
The structural irony is that the largest single concentration of U.S. nationals on Bahraini soil is not in any Bahraini administrative dataset at all. The U.S. Naval Forces Central Command and Fifth Fleet headquarters in Manama anchor a U.S. military and dependant population estimated by U.S.-side sources at approximately 9,000. The Labour Market Regulatory Authority's quarterly Expatriate Management System reports — the only Bahraini source with any nationality disaggregation of permits — list the top twenty source-country nationalities for workers and the top ten for dependants. The United States appears in neither list: the naval population is resident on Bahraini territory under a status-of-forces arrangement, explicitly outside the labour authority's administrative scope, and the civilian U.S. population is folded into "Other."
Kuwait: a register that exists, a binary that publishes
Kuwait operates the most sophisticated population register in the Gulf: the Public Authority for Civil Information's continuous Civil Information Register, unique among GCC member states, most recently reporting a total population of 5,098,539 as of 30 June 2025. The Central Statistical Bureau's residency series disaggregates by article of the residency law crossed with eight nationality groups — including "North American Countries," a United States-and-Canada aggregate; only the CSB's tourism bulletin lists the United States as its own row. The Ministry of Interior, which administers residence permits and naturalization, publishes no aggregate statistics at all — its public-facing portals are service-oriented. On the transparency scoring, Kuwait sits near the bottom of the index, at 1.0 on the U.S.-born domain and 1.5 on the U.S.-citizen domain, because the apparatus that holds the data does not publish it at U.S. resolution.
The UAE: publication that stopped
UAE federal authorities have not published population, residency, or labour-force statistics with any nationality breakdown for any year since approximately 2010. The most recent federal census producing national / non-national population data was conducted in 2005 (federal totals: 825,495 nationals and 3,280,932 non-nationals). The Federal Competitiveness and Statistics Centre's most recent statistical reports publish population estimates for 2000–2024 broken down by gender only. The Federal Authority for Identity, Citizenship, Customs and Port Security publishes biannual aggregate "transaction" totals for entry permits, residency permits, and exit / entry events — without nationality breakdown. The most recent federal dataset providing any nationality breakdown at all is a births-by-citizenship series covering 2010–2019. No annual series of residence permits issued to U.S. nationals — or to any specific source-country nationality — is publicly available from any UAE federal source.
Saudi Arabia: the partial exception
Saudi Arabia is the partial exception that shows the wall is policy, not capacity. The 2022 Census of Population is the first Saudi census to publish detailed non-Saudi population by country of citizenship, including a separate U.S. line: 20,485 U.S. nationals (11,866 male, 8,619 female) at the reference date of 10 May 2022 — the largest documented U.S.-citizen resident population among the GCC states surveyed in this research. The composition skews male (58 percent), consistent with the broader pattern of single-male labour migration to the Gulf, but is far less male-skewed than the overall non-Saudi population (76 percent male).
Around the census, the picture thins out again. Workforce datasets compiled from ministry records show 6,882 U.S. workers in 2020, 6,127 in 2021, and 6,141 in 2022, with no more recent nationality-disaggregated series identified; the post-census population estimates revert to a Saudi / non-Saudi binary. Tourism is the one flow the kingdom publishes at U.S. resolution: inbound U.S. tourist arrivals grew from 61,100 in 2021 to 227,000 in 2022, 331,000 in 2023, and 388,000 in 2024 — short-term visitors, not residents.
The wall is policy, not capacity
GCC-Stat, the statistical arm of the Gulf Cooperation Council, publishes harmonized statistics across the six member states — and its outputs use a national / non-national binary or regional aggregation. It does not produce source-country breakdowns beyond what individual member states publish. The cluster shares one structural feature: each state operates an administrative apparatus that demonstrably holds nationality-disaggregated data internally for visa-management or security purposes, but does not publish the data at the disaggregation level at which it manifestly exists. The non-publication is policy rather than capacity.
That distinction matters, because policy can be petitioned. AER's records-request programme is targeted precisely at the countries where the gap between what is internally enumerated and what is publicly disseminated is largest — and the first complete return on that framework, in Guatemala, demonstrated that a data wall built on administrative non-publication rather than administrative non-collection is breachable by the appropriate formal instrument: a records request resolved in four working days returned a complete year-by-year, visa-category-disaggregated count of U.S. nationals with valid residency.