Year	Percent
1950	13.83415
1955	13.28052
1960	13.20514
1965	12.59804
1970	12.17198
1975	11.55391
1980	10.67008
1985	10.41595
1990	9.9767
1995	9.99658
2000	9.57369
2005	9.1155
2010	9.17222
2015	10.08324
2020	11.85594
2025	14.10777
2030	16.23527
2035	17.8854
2040	18.8745
2045	19.56846
2050	20.70977
2055	22.30602
2060	23.59059
2065	24.48052
2070	24.84654
2075	24.85885
2080	25.11258
2085	25.49234
2090	25.79764
2095	25.86664
2100	25.74275