Year	Percent
1950	29.58794
1955	32.04566
1960	32.84994
1965	31.49123
1970	25.65379
1975	23.80448
1980	22.67679
1985	23.38339
1990	23.74082
1995	24.90186
2000	27.20472
2005	35.89228
2010	43.31906
2015	48.07259
2020	47.09819
2025	41.04181
2030	32.98602
2035	28.13412
2040	26.69311
2045	26.28068
2050	25.18401
2055	23.08583
2060	21.37903
2065	20.70027
2070	20.90414
2075	21.33316
2080	21.42895
2085	21.09605
2090	20.67069
2095	20.49435
2100	20.6028