Year	Percent
1950	14.32469
1955	16.51365
1960	17.65269
1965	17.81568
1970	17.66411
1975	17.65284
1980	18.00415
1985	18.58883
1990	18.24784
1995	17.19858
2000	16.36413
2005	15.80915
2010	15.48068
2015	15.08289
2020	14.20284
2025	13.32814
2030	12.57705
2035	11.97438
2040	11.45465
2045	10.9447
2050	10.42499
2055	9.89567
2060	9.42554
2065	9.00246
2070	8.64076
2075	8.27226
2080	7.91138
2085	7.57244
2090	7.26151
2095	6.99386
2100	6.75388