Year	Percent
1950	9.7439
1955	8.71523
1960	9.37609
1965	10.49956
1970	11.63589
1975	11.76593
1980	10.70515
1985	11.67955
1990	15.23692
1995	17.02135
2000	18.68188
2005	18.98556
2010	20.96186
2015	23.76039
2020	25.17941
2025	26.06132
2030	26.8768
2035	28.06223
2040	29.44353
2045	30.57271
2050	32.0899
2055	33.25486
2060	34.01672
2065	34.69346
2070	34.97122
2075	35.20502
2080	35.51919
2085	35.87716
2090	36.21568
2095	36.5203
2100	36.81372