Year	Percent
1950	11.73833
1955	11.75499
1960	11.94928
1965	12.09583
1970	12.15654
1975	12.31341
1980	12.58361
1985	12.81597
1990	12.89746
1995	12.45788
2000	12.08229
2005	12.27861
2010	12.37054
2015	12.31787
2020	11.95069
2025	11.43145
2030	11.02515
2035	10.73656
2040	10.51135
2045	10.23622
2050	9.88558
2055	9.50598
2060	9.155
2065	8.85311
2070	8.59447
2075	8.35831
2080	8.10468
2085	7.8362
2090	7.57384
2095	7.34011
2100	7.13229