Year	Percent
1950	8.06791
1955	8.05868
1960	8.56027
1965	9.69915
1970	12.82034
1975	13.50189
1980	13.3041
1985	13.71936
1990	17.59018
1995	18.93483
2000	19.92254
2005	20.68274
2010	21.97083
2015	23.50392
2020	25.43484
2025	27.73504
2030	30.87778
2035	33.96072
2040	36.98794
2045	39.17606
2050	39.72467
2055	39.77455
2060	39.76954
2065	39.73974
2070	40.24733
2075	40.22545
2080	39.81651
2085	39.32822
2090	39.03251
2095	38.95087
2100	39.06291