Year	Percent
1950	4.65245
1955	4.60933
1960	4.58183
1965	4.68717
1970	4.95917
1975	5.38622
1980	5.6907
1985	6.07932
1990	7.53157
1995	8.14409
2000	8.86887
2005	9.99393
2010	11.64176
2015	13.46056
2020	15.98523
2025	18.95568
2030	21.69001
2035	23.85478
2040	26.27912
2045	29.02481
2050	31.79448
2055	34.25398
2060	36.25671
2065	37.55889
2070	38.7574
2075	39.69017
2080	40.37047
2085	40.77683
2090	41.0105
2095	41.1633
2100	41.29847