Year	Percent
1950	9.25823
1955	8.33515
1960	7.2124
1965	6.60045
1970	6.51131
1975	6.38377
1980	6.37256
1985	7.0645
1990	9.26378
1995	9.30298
2000	10.04367
2005	10.75829
2010	11.88973
2015	11.29352
2020	13.01676
2025	16.76713
2030	20.14375
2035	22.25483
2040	24.43201
2045	27.39613
2050	30.61398
2055	33.85209
2060	36.18177
2065	37.42211
2070	37.33638
2075	37.54071
2080	37.69608
2085	38.40265
2090	39.28345
2095	39.78328
2100	39.86056