Year	Percent
1950	10.07064
1955	9.19416
1960	8.3029
1965	8.47572
1970	10.09922
1975	10.30425
1980	10.38366
1985	10.50556
1990	10.72236
1995	10.84242
2000	10.53804
2005	10.47367
2010	10.78967
2015	11.17367
2020	10.92363
2025	10.57874
2030	10.24654
2035	10.20456
2040	10.12916
2045	9.91843
2050	9.60984
2055	9.3113
2060	9.06733
2065	8.84876
2070	8.6259
2075	8.37445
2080	8.12212
2085	7.8824
2090	7.63926
2095	7.41427
2100	7.18457