Year	Percent
1950	13.7622
1955	13.66674
1960	15.97312
1965	15.47496
1970	15.09761
1975	14.55293
1980	14.03863
1985	13.76695
1990	13.41248
1995	13.20184
2000	12.58137
2005	12.12236
2010	10.91609
2015	10.5383
2020	10.14624
2025	9.73419
2030	9.28222
2035	8.83988
2040	8.42857
2045	8.03337
2050	7.67435
2055	7.34808
2060	7.03571
2065	6.72682
2070	6.45486
2075	6.21347
2080	6.00564
2085	5.82055
2090	5.65408
2095	5.50736
2100	5.37724