Year	Percent
1950	26.72507
1955	24.69246
1960	24.38029
1965	23.55625
1970	21.48174
1975	20.97973
1980	22.2915
1985	24.99128
1990	28.73949
1995	28.84607
2000	28.73246
2005	28.05589
2010	27.08145
2015	26.4793
2020	27.17149
2025	28.36057
2030	30.70078
2035	31.3489
2040	30.72627
2045	29.92069
2050	28.39779
2055	27.92979
2060	28.22829
2065	28.35036
2070	27.83366
2075	26.69983
2080	25.51747
2085	24.77252
2090	24.53144
2095	24.45851
2100	24.13932