Year	Percent
1950	14.52738
1955	16.68617
1960	16.6033
1965	16.37784
1970	16.22501
1975	16.62061
1980	17.27713
1985	17.74158
1990	17.88242
1995	17.76978
2000	17.48764
2005	17.14662
2010	16.7473
2015	16.12217
2020	15.46459
2025	14.77575
2030	14.08565
2035	13.37795
2040	12.6722
2045	12.0082
2050	11.37034
2055	10.76089
2060	10.20266
2065	9.67854
2070	9.19584
2075	8.74185
2080	8.32615
2085	7.92832
2090	7.56466
2095	7.22081
2100	6.91606