Year	Percent
1950	28.44023
1955	28.08074
1960	25.7988
1965	23.31676
1970	23.92202
1975	22.7134
1980	27.32316
1985	29.52626
1990	32.44509
1995	31.50303
2000	31.77178
2005	26.93978
2010	23.37515
2015	21.06133
2020	21.14323
2025	22.03367
2030	23.39283
2035	22.69008
2040	20.84323
2045	19.62983
2050	19.47124
2055	19.78228
2060	20.4067
2065	20.56542
2070	20.04499
2075	19.31179
2080	18.86985
2085	18.83081
2090	18.9871
2095	19.08031
2100	18.91932