Year	Percent
1950	9.25727
1955	8.024
1960	7.15448
1965	6.95913
1970	7.64263
1975	7.56102
1980	8.19648
1985	8.70559
1990	11.59679
1995	13.27533
2000	15.6328
2005	18.59052
2010	20.00651
2015	23.20193
2020	26.46546
2025	29.89583
2030	31.96461
2035	33.28872
2040	33.4325
2045	33.46179
2050	33.29386
2055	33.47083
2060	33.68023
2065	33.98736
2070	34.18375
2075	34.72535
2080	35.4621
2085	36.1394
2090	36.71221
2095	37.19257
2100	37.63612