Year	Percent
1950	14.4736
1955	15.06301
1960	15.44729
1965	15.77521
1970	16.00483
1975	15.95527
1980	15.91273
1985	16.00352
1990	16.89828
1995	18.22336
2000	21.4484
2005	22.951
2010	23.59741
2015	24.60573
2020	25.55395
2025	25.53374
2030	24.6621
2035	23.94551
2040	22.94574
2045	23.1337
2050	24.45216
2055	25.26281
2060	25.56121
2065	24.93534
2070	23.81044
2075	23.24795
2080	23.13567
2085	23.24047
2090	23.17437
2095	22.72796
2100	22.10155