Year	Percent
1950	19.03214
1955	17.03434
1960	13.61886
1965	11.6138
1970	12.63984
1975	13.27791
1980	14.77589
1985	13.41222
1990	11.62221
1995	11.46194
2000	11.654
2005	13.96768
2010	15.57511
2015	16.1324
2020	16.42337
2025	17.35665
2030	19.29464
2035	20.77074
2040	21.62596
2045	21.28749
2050	21.13052
2055	22.04899
2060	23.22042
2065	24.46193
2070	24.73916
2075	24.42878
2080	24.41146
2085	24.83069
2090	25.36409
2095	25.57582
2100	25.34999