Year	Percent
1950	14.50646
1955	16.69792
1960	16.7049
1965	16.53854
1970	16.41905
1975	16.80998
1980	17.50242
1985	17.97942
1990	18.11605
1995	17.96761
2000	17.63731
2005	17.254
2010	16.82244
2015	16.18166
2020	15.51908
2025	14.83083
2030	14.16405
2035	13.46716
2040	12.7698
2045	12.11117
2050	11.47128
2055	10.86227
2060	10.30868
2065	9.79018
2070	9.31326
2075	8.86431
2080	8.45118
2085	8.05409
2090	7.6906
2095	7.34503
2100	7.03704