Year	Percent
1950	4.41223
1955	4.09171
1960	3.84341
1965	3.78231
1970	3.80602
1975	3.90239
1980	4.03596
1985	4.28941
1990	4.95145
1995	5.23743
2000	5.61493
2005	6.14465
2010	6.53172
2015	7.77263
2020	9.33886
2025	10.81426
2030	12.41673
2035	14.48763
2040	17.02912
2045	20.06506
2050	23.20459
2055	26.16256
2060	28.83016
2065	31.14892
2070	33.35285
2075	35.23608
2080	36.78602
2085	37.97271
2090	38.87595
2095	39.56363
2100	40.10546