Year	Percent
1950	29.10368
1955	25.40879
1960	24.63542
1965	22.75632
1970	22.26287
1975	21.97548
1980	22.88409
1985	26.76048
1990	28.85526
1995	28.68161
2000	30.83379
2005	32.79492
2010	30.72333
2015	32.38752
2020	34.00862
2025	34.63144
2030	33.97993
2035	32.85825
2040	31.87056
2045	31.1071
2050	30.70289
2055	30.09058
2060	29.14128
2065	28.13255
2070	27.30002
2075	26.6773
2080	26.17215
2085	25.66475
2090	25.11597
2095	24.58474
2100	24.11623