Year	Percent
1950	5.44751
1955	5.13057
1960	5.08592
1965	5.17176
1970	6.21622
1975	7.00946
1980	7.30401
1985	7.26543
1990	8.30616
1995	8.68701
2000	9.55966
2005	10.83717
2010	12.43227
2015	14.22007
2020	16.45418
2025	18.95639
2030	20.22598
2035	21.54306
2040	23.21066
2045	26.23636
2050	28.39424
2055	29.0298
2060	28.85056
2065	29.0477
2070	29.83299
2075	30.78706
2080	31.34069
2085	31.53564
2090	31.59132
2095	31.75415
2100	32.12894