Year	Percent
1950	26.16597
1955	26.43552
1960	26.64943
1965	25.62062
1970	24.36351
1975	22.51158
1980	22.88182
1985	22.65021
1990	23.74614
1995	24.93551
2000	26.76273
2005	28.46585
2010	30.0031
2015	29.96657
2020	29.36772
2025	28.1324
2030	26.62723
2035	25.62287
2040	24.78992
2045	24.47711
2050	24.40813
2055	23.99436
2060	23.88794
2065	23.63719
2070	23.55033
2075	23.49527
2080	23.43049
2085	23.30231
2090	23.12373
2095	22.92363
2100	22.73126