year	PRC
	warheads				megatons
	(WRJ)	(NRDC 2006)	(Lewis 2004)	(NRDC 1994)	(WRJ)
1964	1	1	1	1	0.04
1965	5	5	1	5	0.18
1966	20	20	5	20	0.63
1967	25	25	10	25	0.73
1968	35	35	15	35	17.3
1969	50	50	20	50	34.1
1970	75	75	30	75	51.2
1971	100	100	45	100	78.0
1972	130	130	60	130	131.3
1973	150	150	65	150	174.5
1974	170	170	75	170	201.2
1975	185	185	80	185	227.8
1976	190	190	80	190	227.8
1977	200	200	80	200	227.9
1978	220	220	90	220	248.0
1979	235	235	95	235	268.0
1980	280	280	105	280	321.6
1981	330	330	125	330	392.3
1982	360	360	135	360	412.6
1983	380	380	140	380	449.0
1984	414	415	150	414	485.3
1985	426	425	152	426	495.3
1986	423	425	145	423	481.4
1987	415	415	130	415	477.2
1988	430	430	110	430	488.2
1989	433	435	103	433	495.5
1990	432	430	85	432	464.5
1991	434	435	75	434	447.5
1992	434	435	75	434	447.5
1993	434	435	65		447.5
1994	434	400			447.5
1995	434	400			447.5
1996	441	400			465.1
1997	464	400			491.5
1998	477	400			520.1
1999	489	400			545.4
2000	492	400	75		544.7
2001	495	400			544.0
2002	518	400			556.3
2003	541	400			568.6
2004		400
2005		400
2006		200
2007