Year	Percent
1950	26.77941
1955	26.1226
1960	25.79914
1965	25.80423
1970	25.65497
1975	26.91138
1980	28.29461
1985	29.56706
1990	30.9691
1995	31.51457
2000	31.61182
2005	31.59476
2010	31.75715
2015	31.68502
2020	31.43346
2025	30.78368
2030	30.04234
2035	29.35589
2040	28.67745
2045	28.1064
2050	27.35822
2055	26.5158
2060	25.68353
2065	24.9067
2070	24.19409
2075	23.53524
2080	22.93123
2085	22.39196
2090	21.91837
2095	21.51716
2100	21.17907