Year	Percent
1950	27.92444
1955	27.29911
1960	26.78483
1965	26.55242
1970	26.69777
1975	27.36928
1980	28.57896
1985	30.09644
1990	31.51951
1995	32.66983
2000	32.92557
2005	32.48234
2010	31.68336
2015	30.60763
2020	29.90395
2025	29.30937
2030	28.81264
2035	28.50022
2040	27.96655
2045	27.44427
2050	26.85815
2055	26.15152
2060	25.52978
2065	24.94779
2070	24.36691
2075	23.79064
2080	23.24212
2085	22.73591
2090	22.28168
2095	21.88938
2100	21.55148