Year	Percent
1950	11.47924
1955	11.63736
1960	10.46465
1965	12.66155
1970	12.81621
1975	13.01345
1980	13.01225
1985	13.00727
1990	13.42925
1995	13.83553
2000	13.41867
2005	12.78828
2010	11.96605
2015	11.48961
2020	11.86601
2025	12.20433
2030	11.26041
2035	10.40782
2040	9.82624
2045	9.46733
2050	9.10524
2055	8.68388
2060	8.21334
2065	7.72748
2070	7.31352
2075	6.96447
2080	6.6817
2085	6.42266
2090	6.16783
2095	5.94703
2100	5.75548