Year	Percent
1950	29.8596
1955	30.0388
1960	28.51842
1965	24.60121
1970	24.01032
1975	25.75178
1980	27.47266
1985	29.73611
1990	31.42159
1995	30.02058
2000	29.05955
2005	29.59328
2010	30.25172
2015	30.81125
2020	31.37236
2025	29.92364
2030	29.77787
2035	30.21551
2040	30.36442
2045	31.28983
2050	30.5298
2055	29.53542
2060	28.82548
2065	28.67771
2070	28.8932
2075	29.081
2080	28.83901
2085	28.16943
2090	27.47972
2095	27.06494
2100	26.93553