Year	Percent
1950	28.35888
1955	27.71414
1960	27.08005
1965	26.35526
1970	26.26252
1975	26.17637
1980	26.21769
1985	26.79004
1990	27.65653
1995	27.24593
2000	27.85425
2005	29.01558
2010	31.4099
2015	34.03728
2020	35.05943
2025	34.57494
2030	33.61332
2035	32.93267
2040	32.81787
2045	32.72592
2050	32.08887
2055	31.10524
2060	30.03382
2065	29.13191
2070	28.36418
2075	27.59625
2080	26.76204
2085	25.91869
2090	25.15699
2095	24.52342
2100	24.00827