Year	Percent
1950	12.75227
1955	13.07139
1960	14.32198
1965	14.29004
1970	14.23789
1975	14.19396
1980	14.24984
1985	14.22588
1990	13.91376
1995	13.11227
2000	12.79345
2005	12.98549
2010	12.58608
2015	12.07275
2020	11.38891
2025	10.9026
2030	10.50486
2035	10.1238
2040	9.7418
2045	9.34917
2050	8.97284
2055	8.61051
2060	8.29704
2065	8.00346
2070	7.7177
2075	7.44544
2080	7.1731
2085	6.92324
2090	6.69286
2095	6.47907
2100	6.28809