Year	Percent
1950	3.53622
1955	3.52368
1960	3.80582
1965	3.71346
1970	3.77697
1975	4.10895
1980	4.42459
1985	4.89315
1990	6.44308
1995	7.21598
2000	7.23905
2005	7.7708
2010	8.08949
2015	9.04139
2020	10.41409
2025	12.07186
2030	13.71612
2035	14.86719
2040	15.63699
2045	15.93672
2050	15.92245
2055	16.65982
2060	17.79376
2065	19.32095
2070	21.70925
2075	23.67446
2080	25.1297
2085	26.48635
2090	27.96171
2095	29.68663
2100	31.48442