Year	Percent
1950	2.94579
1955	3.99472
1960	4.8181
1965	4.38261
1970	3.93391
1975	4.2525
1980	4.86415
1985	5.37503
1990	7.01187
1995	7.94996
2000	8.23902
2005	8.29267
2010	7.99428
2015	8.13527
2020	9.04834
2025	9.63789
2030	10.44732
2035	11.56198
2040	12.19505
2045	12.6581
2050	12.69886
2055	13.8885
2060	15.45968
2065	17.41545
2070	19.38478
2075	20.82408
2080	21.79738
2085	22.82108
2090	24.12872
2095	25.66999
2100	27.23245