Year	Percent
1950	24.85378
1955	25.07299
1960	22.44022
1965	22.74141
1970	23.50628
1975	24.02971
1980	25.15421
1985	24.1971
1990	23.85684
1995	25.3096
2000	26.6006
2005	28.14897
2010	29.19433
2015	28.2547
2020	28.13199
2025	27.80786
2030	27.05427
2035	25.74899
2040	23.39652
2045	21.28896
2050	20.54694
2055	21.15354
2060	22.1884
2065	22.96888
2070	22.61975
2075	21.81794
2080	21.34616
2085	21.4403
2090	21.87449
2095	22.17647
2100	22.03744