Year	Percent
1950	4.16982
1955	4.38814
1960	4.62653
1965	4.82952
1970	4.9837
1975	5.1885
1980	5.36497
1985	5.4572
1990	6.17824
1995	6.21051
2000	6.54238
2005	7.06923
2010	7.89219
2015	9.00553
2020	10.06917
2025	11.08104
2030	12.02657
2035	12.84116
2040	14.1602
2045	16.12589
2050	18.37704
2055	20.63368
2060	22.81958
2065	24.40906
2070	25.83021
2075	27.06346
2080	28.33616
2085	29.58785
2090	30.7539
2095	31.81093
2100	32.77891