Year	Percent
1950	4.52297
1955	4.71874
1960	4.8928
1965	5.05155
1970	5.0496
1975	4.78554
1980	4.76953
1985	5.25649
1990	6.55411
1995	7.22347
2000	7.7271
2005	8.22757
2010	8.6266
2015	9.95194
2020	11.86688
2025	13.91281
2030	15.74468
2035	17.52568
2040	19.46037
2045	21.81481
2050	24.04034
2055	26.1883
2060	27.71257
2065	29.09627
2070	30.50056
2075	32.31646
2080	33.83542
2085	35.05167
2090	36.02054
2095	36.84325
2100	37.6257