Year	Percent
1950	27.30522
1955	28.33459
1960	28.76867
1965	28.59366
1970	28.56334
1975	27.0135
1980	26.20991
1985	28.11036
1990	28.36452
1995	29.31497
2000	30.79563
2005	30.75991
2010	32.86361
2015	34.42664
2020	34.89998
2025	35.04046
2030	33.49365
2035	32.33289
2040	31.34991
2045	30.58738
2050	30.14181
2055	29.52838
2060	28.77889
2065	27.98104
2070	27.28225
2075	26.78528
2080	26.47467
2085	26.24945
2090	26.01184
2095	25.7312
2100	25.45783