Year	Percent
1950	5.13755
1955	5.06222
1960	5.4747
1965	5.41946
1970	5.41604
1975	5.18355
1980	4.90561
1985	4.63203
1990	5.20306
1995	5.62798
2000	6.3979
2005	7.0394
2010	7.80541
2015	8.93955
2020	10.08405
2025	11.55825
2030	13.26854
2035	15.23606
2040	17.71468
2045	20.50801
2050	23.01939
2055	24.82471
2060	25.43584
2065	25.6572
2070	27.03089
2075	29.40099
2080	31.20482
2085	32.43638
2090	33.22566
2095	33.84676
2100	34.52728