Year	Years
1800	384
1900	312.9
1930	233.5
1950	143
1951	141.2
1952	137.3
1953	133.9
1954	130.5
1955	126.9
1956	123.2
1957	119.5
1958	115.6
1959	111.8
1960	108.1
1961	104.5
1962	100.3
1963	96.78
1964	93.32
1965	89.91
1966	86.57
1967	83.25
1968	80.12
1969	77.15
1970	74.82
1971	72.64
1972	71.06
1982	107.6
1983	105.1
1984	102.9
1985	100.7
1986	98.7
1987	97
1988	95.6
1989	94.8
1990	94.5
1991	94.8
1992	95.2
1993	95.5
1994	95.2
1995	94
1996	91.7
1997	88.4
1998	84.1
1999	79.2
2000	74.1
2001	68.9
2002	63.9
2003	59.3
2004	55.2
2005	51.7
2006	48.5
2007	45.7
2008	43.2
2009	40.9
2010	38.9
2011	37.2
2012	35.6
2013	34.2