Year	Percent
1950	5.72309
1955	5.74289
1960	5.74635
1965	5.81304
1970	5.80965
1975	5.14971
1980	4.43619
1985	4.19124
1990	4.55773
1995	4.67161
2000	4.6435
2005	4.58491
2010	4.6069
2015	4.9554
2020	5.35564
2025	5.78502
2030	6.28088
2035	6.87964
2040	7.55987
2045	8.28671
2050	9.1335
2055	10.20201
2060	11.49581
2065	12.7797
2070	14.01375
2075	15.20536
2080	16.47932
2085	17.81241
2090	19.15493
2095	20.46959
2100	21.77167