Year	Percent
1950	15.09008
1955	15.27683
1960	14.23675
1965	14.17948
1970	13.38565
1975	12.30411
1980	11.08842
1985	10.86551
1990	10.00907
1995	10.40017
2000	10.5032
2005	10.69842
2010	11.34415
2015	11.43887
2020	12.01499
2025	12.63683
2030	13.15031
2035	13.97152
2040	14.88032
2045	16.06406
2050	17.50264
2055	19.05071
2060	20.45904
2065	21.69259
2070	22.7609
2075	23.65142
2080	24.4157
2085	25.02108
2090	25.44509
2095	25.70766
2100	25.85844