Year	Percent
1950	15.59545
1955	15.22416
1960	14.11054
1965	13.16769
1970	12.46019
1975	12.29158
1980	11.73832
1985	11.29118
1990	11.15223
1995	12.32423
2000	14.21911
2005	16.63319
2010	18.56584
2015	19.66008
2020	21.46435
2025	23.68848
2030	25.61447
2035	26.45431
2040	25.1663
2045	22.9392
2050	22.24544
2055	23.40041
2060	25.15933
2065	26.57255
2070	26.13036
2075	24.33103
2080	23.1778
2085	22.91898
2090	23.31657
2095	23.72035
2100	23.65895