Year	Percent
1950	11.31359
1955	12.18509
1960	11.5103
1965	11.88206
1970	12.09398
1975	12.42957
1980	11.87218
1985	13.63855
1990	13.68383
1995	12.71409
2000	12.37853
2005	12.51843
2010	12.41447
2015	12.27497
2020	12.26279
2025	11.64826
2030	10.8006
2035	10.25052
2040	9.91506
2045	9.6359
2050	9.319
2055	8.92971
2060	8.50052
2065	8.12192
2070	7.79117
2075	7.51436
2080	7.23539
2085	6.9536
2090	6.67306
2095	6.41376
2100	6.18407