Year	Percent
1950	7.14175
1955	6.59917
1960	6.02448
1965	5.73976
1970	5.95212
1975	6.39494
1980	7.1117
1985	7.54935
1990	8.52473
1995	9.30755
2000	10.15484
2005	11.0245
2010	12.58465
2015	15.36745
2020	17.57152
2025	20.82907
2030	25.09188
2035	28.54056
2040	30.10437
2045	31.75664
2050	35.09536
2055	36.41137
2060	36.28924
2065	36.10376
2070	36.32737
2075	36.97982
2080	37.4179
2085	37.49643
2090	37.45847
2095	37.50516
2100	37.67798