Year	Percent
1950	27.55679
1955	27.51339
1960	25.06145
1965	24.48543
1970	23.93318
1975	23.76038
1980	24.73232
1985	23.61745
1990	24.24538
1995	24.90623
2000	26.4526
2005	28.32099
2010	28.07567
2015	27.78127
2020	26.82623
2025	25.85324
2030	25.13539
2035	24.74678
2040	24.10695
2045	23.42667
2050	23.14486
2055	22.98903
2060	23.31421
2065	23.55581
2070	23.35948
2075	23.03618
2080	22.71177
2085	22.56045
2090	22.54931
2095	22.57579
2100	22.4964