Year	Percent
1950	10.01996
1955	10.17167
1960	10.39443
1965	10.14645
1970	9.29101
1975	9.13852
1980	9.3466
1985	9.69343
1990	10.37019
1995	10.84529
2000	11.12498
2005	10.82809
2010	10.65509
2015	10.88107
2020	11.17985
2025	11.29284
2030	10.8662
2035	10.52595
2040	10.19407
2045	9.84618
2050	9.47915
2055	9.11848
2060	8.76009
2065	8.43176
2070	8.1409
2075	7.85386
2080	7.60444
2085	7.37245
2090	7.1695
2095	6.99414
2100	6.85019