Year	Years
1800	458.2
1950	364.1
1951	362
1952	358.8
1953	355.2
1962	336.4
1963	327.5
1964	318.4
1965	309.2
1966	300.1
1967	290.7
1968	281.4
1969	272
1970	262.3
1971	251.9
1972	241
1973	229.4
1974	217.3
1975	205.6
1976	194.3
1977	183.8
1978	173.8
1979	164.2
1980	155.5
1981	147.4
1982	139.9
1983	132.9
1984	126.2
1985	120
1986	114.1
1987	108.5
1988	103.3
1989	98.3
1990	93.5
1991	88.9
1992	84.3
1993	79.6
1994	74.8
1995	69.9
1996	64.9
1997	59.7
1998	54.4
1999	49.1
2000	43.8
2001	38.7
2002	34
2003	29.7
2004	25.9
2005	22.7
2006	20.1
2007	17.8
2008	16
2009	14.4
2010	13
2011	11.8
2012	10.7
2013	9.9