Year	Percent
1950	11.79212
1955	11.82099
1960	12.03
1965	12.18642
1970	12.2554
1975	12.4257
1980	12.6919
1985	12.92314
1990	13.00287
1995	12.56001
2000	12.18426
2005	12.3961
2010	12.56562
2015	12.50711
2020	12.13723
2025	11.60961
2030	11.18596
2035	10.88414
2040	10.65189
2045	10.37768
2050	10.0294
2055	9.65158
2060	9.30396
2065	9.00772
2070	8.75643
2075	8.52964
2080	8.2844
2085	8.02324
2090	7.76714
2095	7.53887
2100	7.33528