Year	Percent
1950	17.46454
1955	17.10424
1960	17.00474
1965	16.67593
1970	16.40422
1975	15.81899
1980	14.68148
1985	13.72215
1990	13.57234
1995	15.03724
2000	16.87589
2005	18.78158
2010	20.89801
2015	22.22833
2020	23.34721
2025	24.26591
2030	24.79558
2035	25.33776
2040	26.13124
2045	27.36116
2050	28.03359
2055	27.96774
2060	27.52635
2065	26.75995
2070	26.56284
2075	26.7734
2080	26.86102
2085	26.67882
2090	26.30216
2095	25.93971
2100	25.7097