Year	Percent
1950	8.04511
1955	6.6912
1960	6.50068
1965	6.63804
1970	6.7034
1975	6.43395
1980	6.23488
1985	6.5801
1990	6.52707
1995	6.7956
2000	6.73068
2005	5.27737
2010	4.03233
2015	4.45539
2020	5.40072
2025	5.10554
2030	5.07962
2035	4.84861
2040	4.48354
2045	4.39744
2050	4.64236
2055	4.89777
2060	4.95275
2065	4.83936
2070	4.68555
2075	4.61179
2080	4.6843
2085	4.82592
2090	4.90432
2095	4.85242
2100	4.72582