Year	Percent
1950	9.60245
1955	9.52352
1960	10.15019
1965	9.67634
1970	10.27826
1975	10.02781
1980	9.92887
1985	10.12602
1990	10.55343
1995	10.82235
2000	10.80346
2005	10.44323
2010	10.3388
2015	10.41909
2020	10.97583
2025	11.45014
2030	11.25114
2035	10.96194
2040	10.80279
2045	10.69656
2050	10.51242
2055	10.21878
2060	9.84133
2065	9.44423
2070	9.08128
2075	8.73255
2080	8.41835
2085	8.10276
2090	7.78639
2095	7.49525
2100	7.20802