Year	Percent
1950	8.10842
1955	6.5521
1960	6.37723
1965	6.57982
1970	7.13373
1975	7.67692
1980	7.68656
1985	7.08207
1990	5.81784
1995	5.44997
2000	5.55419
2005	5.84219
2010	5.94008
2015	5.98792
2020	5.72354
2025	5.48806
2030	5.51859
2035	5.71113
2040	5.6734
2045	5.60024
2050	5.54104
2055	5.46786
2060	5.43633
2065	5.46875
2070	5.50598
2075	5.48949
2080	5.43675
2085	5.36397
2090	5.29392
2095	5.24226
2100	5.20902