Year	Percent
1950	9.35028
1955	9.91037
1960	10.36024
1965	11.41511
1970	12.65799
1975	13.52654
1980	13.9625
1985	14.91079
1990	18.99986
1995	20.47161
2000	21.69428
2005	22.47625
2010	24.67276
2015	27.00349
2020	29.3497
2025	31.98766
2030	34.46388
2035	37.44541
2040	39.91155
2045	41.25394
2050	41.66935
2055	41.86421
2060	42.22622
2065	42.58846
2070	42.77478
2075	42.6644
2080	42.25282
2085	41.82256
2090	41.59899
2095	41.5305
2100	41.53345