Year	Percent
1950	10.15072
1955	8.8104
1960	8.07542
1965	8.34292
1970	8.75261
1975	9.83037
1980	9.82918
1985	10.64977
1990	12.80713
1995	13.09802
2000	13.67626
2005	13.56572
2010	14.09077
2015	16.5381
2020	18.93687
2025	21.61842
2030	22.5518
2035	23.81613
2040	25.86657
2045	29.22184
2050	34.49438
2055	37.57167
2060	38.29875
2065	37.76937
2070	37.68392
2075	37.94593
2080	37.78007
2085	37.37224
2090	36.98209
2095	36.66102
2100	36.53913