Year	Percent
1950	6.99252
1955	7.17088
1960	8.56672
1965	9.0096
1970	7.85753
1975	7.59752
1980	7.99792
1985	8.00201
1990	7.40524
1995	6.37544
2000	5.38073
2005	5.92166
2010	6.57501
2015	6.56789
2020	5.99219
2025	6.03516
2030	5.30069
2035	5.44937
2040	5.75123
2045	5.89695
2050	5.82802
2055	5.66463
2060	5.50188
2065	5.45115
2070	5.51954
2075	5.58127
2080	5.55817
2085	5.45784
2090	5.34398
2095	5.2757
2100	5.26141