Year	Percent
1950	16.08283
1955	16.43319
1960	16.73816
1965	17.01225
1970	17.41562
1975	18.40845
1980	19.13101
1985	18.2318
1990	17.03085
1995	16.39876
2000	14.93239
2005	14.15577
2010	13.99711
2015	14.30068
2020	13.46836
2025	12.55096
2030	11.64935
2035	10.89699
2040	10.29159
2045	9.77164
2050	9.23641
2055	8.67168
2060	8.13657
2065	7.67958
2070	7.30034
2075	6.98627
2080	6.71213
2085	6.44462
2090	6.20431
2095	6.004
2100	5.84185