Year	Percent
1950	6.46145
1955	5.83618
1960	8.49038
1965	8.04164
1970	7.81911
1975	7.81548
1980	7.46732
1985	7.20668
1990	6.23996
1995	6.38448
2000	6.17085
2005	5.77984
2010	5.7462
2015	5.83911
2020	5.82682
2025	5.60531
2030	5.41479
2035	5.30438
2040	5.28689
2045	5.33932
2050	5.36717
2055	5.32606
2060	5.25222
2065	5.19742
2070	5.18107
2075	5.18496
2080	5.17083
2085	5.12924
2090	5.06571
2095	5.00319
2100	4.96693