RAF : In numbers

Year	1918[26]	1951[27]	1975[28]	1985[28]	1993[28]	1997[28]	2005/2006[29][30]	2009
Regular	316,170[31]	148,900	95,000	93,400	80,900	56,900	48,700	43,800
National Service	N/A	88,900	N/A	N/A	N/A	N/A	N/A	N/A
Regular Reserve	N/A	N/K	N/K	29,800	46,100	45,400	35,000	36,000
Volunteer Reserve	N/A	18,100	N/K	1,200	1,800	1,400	1,400	1,900

from ze wikipedia