Year	Percent
1950	14.65379
1955	13.68475
1960	15.23968
1965	16.22193
1970	16.5772
1975	16.53414
1980	16.62048
1985	16.7318
1990	16.96232
1995	15.81617
2000	14.5873
2005	13.21045
2010	13.28151
2015	13.1746
2020	12.26732
2025	11.2101
2030	10.28098
2035	9.6976
2040	9.32578
2045	8.90673
2050	8.39247
2055	7.84799
2060	7.39702
2065	7.07519
2070	6.82986
2075	6.60866
2080	6.37143
2085	6.13985
2090	5.94163
2095	5.80381
2100	5.70259