Year	Percent
1950	15.75039
1955	16.52338
1960	17.00478
1965	16.71116
1970	15.90581
1975	14.75045
1980	13.60046
1985	12.93569
1990	12.01549
1995	11.58396
2000	11.09612
2005	10.6176
2010	10.65759
2015	10.95628
2020	11.53492
2025	12.06434
2030	12.36508
2035	12.65046
2040	13.16887
2045	14.19239
2050	15.68943
2055	17.17942
2060	18.53262
2065	19.69496
2070	20.70169
2075	21.71045
2080	22.67406
2085	23.47511
2090	24.0677
2095	24.49823
2100	24.81784