Year	Percent
1950	5.45026
1955	5.62526
1960	5.73389
1965	6.14964
1970	7.12114
1975	8.09839
1980	7.79147
1985	7.87264
1990	10.97901
1995	11.95494
2000	13.71617
2005	12.55308
2010	13.37862
2015	15.37731
2020	17.38822
2025	19.0507
2030	18.99921
2035	19.68216
2040	20.53825
2045	22.18054
2050	24.24896
2055	24.26224
2060	22.89455
2065	22.17737
2070	22.31899
2075	23.66132
2080	24.8741
2085	25.77441
2090	26.18206
2095	26.38119
2100	26.79669