year	nm	ni	p	r
1948	1898.69	86.5	100	3.03
1949	1880.29	90.1	102.15	3.07
1950	1979.49	95.3	107.68	3.15
1951	1803.79	99.7	109.56	3.41
1952	1764.71	98.2	103.81	3.66
1953	1793.97	104.8	104.49	3.64
1954	1920.63	96.1	93.48	3.7
1955	2216.95	99.8	95.23	3.74
1956	2341.89	113.1	105.82	3.99
1957	2413.16	113.9	104.59	4.18
1958	2526.02	126.9	108.15	4.13
1959	2720.22	129.5	109.19	4.05
1960	2868.61	141.4	111.19	4.06
1961	3045.82	148	113.32	4.16
1962	3309.98	154	115.7	4.49
1963	3852.12	172.1	123.19	4.66
1964	4080.06	200.1	132.96	4.8