Year	Percent
1950	28.32742
1955	28.83174
1960	28.5791
1965	27.7779
1970	26.77315
1975	25.45796
1980	24.48369
1985	25.96083
1990	28.02032
1995	30.34367
2000	32.07849
2005	33.06514
2010	33.59774
2015	34.15278
2020	34.09867
2025	33.58838
2030	32.54265
2035	31.27254
2040	29.7959
2045	28.19867
2050	26.84027
2055	25.55824
2060	24.29179
2065	23.17778
2070	22.27004
2075	21.58168
2080	21.08002
2085	20.69303
2090	20.40447
2095	20.20222
2100	20.07147