Year	Percent
1950	6.74167
1955	9.5628
1960	10.48611
1965	10.44723
1970	8.94599
1975	6.95177
1980	7.21514
1985	7.4113
1990	7.87009
1995	7.96228
2000	5.58782
2005	4.54008
2010	4.8343
2015	5.51669
2020	6.50978
2025	6.23079
2030	5.77402
2035	5.23278
2040	5.08184
2045	5.43841
2050	5.90645
2055	6.08081
2060	5.90661
2065	5.61948
2070	5.47344
2075	5.56218
2080	5.75556
2085	5.85062
2090	5.7689
2095	5.57737
2100	5.42261