Year	Percent
1950	10.84489
1955	10.61025
1960	10.29079
1965	11.79412
1970	11.68472
1975	11.42048
1980	11.1233
1985	11.29023
1990	11.64883
1995	11.93563
2000	12.14426
2005	12.30068
2010	12.27325
2015	12.28213
2020	12.22594
2025	11.97403
2030	11.68762
2035	11.36594
2040	11.0056
2045	10.6157
2050	10.20683
2055	9.81538
2060	9.43234
2065	9.05217
2070	8.6973
2075	8.35519
2080	8.03406
2085	7.72559
2090	7.44087
2095	7.16234
2100	6.90433