Year	Percent
1950	4.30021
1955	4.114
1960	4.15184
1965	4.24684
1970	4.30986
1975	4.32438
1980	4.2895
1985	4.27604
1990	4.59545
1995	4.5597
2000	4.44784
2005	4.37207
2010	4.29259
2015	4.21874
2020	4.20493
2025	4.30925
2030	4.57849
2035	5.11106
2040	5.80842
2045	6.53743
2050	7.27925
2055	8.06826
2060	8.98731
2065	9.99919
2070	10.98222
2075	11.96874
2080	13.01093
2085	14.09913
2090	15.20762
2095	16.31273
2100	17.41041