Year	Percent
1950	13.43065
1955	13.5993
1960	15.34666
1965	15.07695
1970	14.6459
1975	14.67244
1980	14.94695
1985	15.20183
1990	15.05163
1995	14.21308
2000	14.22112
2005	13.65493
2010	12.95222
2015	11.45889
2020	10.6701
2025	10.12379
2030	9.53121
2035	8.90807
2040	8.29395
2045	7.74538
2050	7.26109
2055	6.84374
2060	6.47826
2065	6.16364
2070	5.87234
2075	5.62539
2080	5.41307
2085	5.24598
2090	5.10426
2095	4.98929
2100	4.88652