Year	Percent
1950	8.66006
1955	7.98234
1960	7.68242
1965	9.98759
1970	10.86579
1975	9.40181
1980	8.68873
1985	8.62002
1990	9.54833
1995	9.28557
2000	8.77785
2005	8.11682
2010	7.60173
2015	7.74184
2020	7.74517
2025	8.00382
2030	8.36892
2035	7.78739
2040	7.35647
2045	7.10659
2050	7.03594
2055	7.0244
2060	6.96722
2065	6.7761
2070	6.50598
2075	6.23902
2080	6.04667
2085	5.92936
2090	5.82635
2095	5.70662
2100	5.5516