Year	Percent
1950	13.28433
1955	12.50836
1960	12.341
1965	13.62925
1970	14.63916
1975	15.12694
1980	14.25754
1985	14.89104
1990	19.38048
1995	21.01764
2000	22.97385
2005	25.28005
2010	26.88232
2015	29.25036
2020	31.27427
2025	33.4388
2030	34.79491
2035	36.06715
2040	36.53904
2045	36.68561
2050	37.16732
2055	38.02887
2060	37.76097
2065	36.65757
2070	35.98
2075	36.00366
2080	36.1654
2085	36.48207
2090	36.62892
2095	36.54661
2100	36.51609