Year	Percent
1950	5.64022
1955	5.11346
1960	4.86435
1965	4.73773
1970	4.671
1975	4.72241
1980	4.98039
1985	5.44118
1990	6.5546
1995	7.30737
2000	8.21157
2005	9.12471
2010	10.0282
2015	11.13382
2020	12.24604
2025	13.51654
2030	14.90466
2035	16.48701
2040	18.20069
2045	19.91587
2050	22.12224
2055	25.28104
2060	28.62224
2065	30.97792
2070	32.94565
2075	34.72586
2080	36.49559
2085	37.98789
2090	39.08509
2095	39.83453
2100	40.36286