Year	Percent
1960	61.46939
1961	51.35714
1962	70.28571
1963	44
1964	57.78572
1965	53.00705
1966	79.75656
1967	85.21611
1968	86.44691
1969	94.69917
1970	160.66975
1971	112.70869
1972	328.04541
1973	166.15123
1974	266.9552
1975	148.75697
1976	107.4751
1977	77.71066
1978	86.28634
1979	80.82667
1980	90.79085
1981	73.21094
1982	85.60571
1983	55.66806
1984	75.91541
1985	86.04762
1986	136.71672
1987	76.84929
1988	123.20202
1989	112.46343
1990	159.53377
1991	152.42003
1992	268.43313
1993	200.28692
1994	482.24529
1995	450.74252
1996	154.90708
1997	95.08393
1998	113.59373
1999	157.92297
2000	385.42853
2001	355.43401
2002	527.46034
2003	368.62593
2004	378.89154
2005	179.81002
2006	183.26141
2007	244.97635
2008	240.79444
2009	170.3257
2010	179.97421
2011	156.58005
2012	137.49634
2013	155.77806
2014	134.1126
2015	97.18341
2016	304.00909
2017	181.7132
2018	152.42979
2019	152.23253
2020	158.68726
2021	162.21498