ic [Yemen (Sanaa) or North Yemen]; used for information dated before 22 May 1990 or CY91
_#_Administrative divisions: The numbers, designatory terms, and first-order administrative divisions are generally those approved by the United States Board on Geographic Names (BGN). Changes that have been reported but not yet acted upon by BGN are noted.
_#_Area: Total area is the sum of all land and water areas delimited by international boundaries and/or coastlines. Land area is the aggregate of all surfaces delimited by international boundaries and/or coastlines, excluding inland water bodies (lakes, reservoirs, rivers). Comparative areas are based on total area equivalents. Most entities are compared with the entire US or one of the 50 states. The smaller entities are compared with Washington, DC (178 km2, 69 miles2) or The Mall in Washington, DC (0.59 km2, 0.23 miles2, 146 acres).
_#_Birth rate: The average annual number of births during a year per 1,000 popu