Year	Percent
1950	10.22858
1955	9.24766
1960	8.43669
1965	8.49831
1970	8.64906
1975	8.91479
1980	8.84861
1985	9.17604
1990	10.94977
1995	11.38547
2000	12.175
2005	10.95122
2010	11.80245
2015	13.61079
2020	16.19929
2025	19.89123
2030	23.43221
2035	26.63768
2040	29.46508
2045	31.64802
2050	32.49435
2055	32.51085
2060	31.80253
2065	31.15348
2070	31.51088
2075	33.0212
2080	34.2717
2085	35.00175
2090	35.55365
2095	36.2102
2100	37.00421