Year	Percent
1950	11.13369
1955	12.09318
1960	14.48678
1965	14.92057
1970	15.76341
1975	16.52186
1980	15.93509
1985	16.08488
1990	15.93705
1995	15.95448
2000	13.91122
2005	13.65594
2010	13.72102
2015	14.10886
2020	12.57478
2025	11.40019
2030	10.70576
2035	10.2667
2040	9.86546
2045	9.3662
2050	8.78844
2055	8.18643
2060	7.65644
2065	7.22481
2070	6.85099
2075	6.5142
2080	6.17996
2085	5.86531
2090	5.58619
2095	5.35158
2100	5.17285