Year	Percent
1950	11.07201
1955	10.55303
1960	11.53937
1965	13.17695
1970	15.21929
1975	16.16292
1980	15.45866
1985	16.54655
1990	20.74929
1995	23.41331
2000	25.01848
2005	25.25281
2010	27.14716
2015	29.08024
2020	31.25125
2025	33.23953
2030	34.46491
2035	35.93026
2040	37.40514
2045	38.78929
2050	39.83901
2055	40.14995
2060	40.65917
2065	40.43539
2070	40.83736
2075	41.05953
2080	40.98425
2085	40.78206
2090	40.61798
2095	40.53562
2100	40.57446