Year	Percent
1950	13.97525
1955	16.95978
1960	16.75491
1965	16.27211
1970	16.25568
1975	15.82472
1980	15.224
1985	14.53039
1990	12.7145
1995	11.32439
2000	10.97162
2005	10.97398
2010	9.80381
2015	8.68809
2020	8.19429
2025	7.87061
2030	7.56423
2035	7.17698
2040	6.76432
2045	6.38305
2050	6.1225
2055	5.98273
2060	5.89225
2065	5.79459
2070	5.67584
2075	5.56798
2080	5.49431
2085	5.46944
2090	5.46575
2095	5.45679
2100	5.42481