Year	Percent
1950	6.52609
1955	6.28128
1960	7.418
1965	8.7588
1970	8.02576
1975	7.93277
1980	7.95864
1985	8.36156
1990	7.67966
1995	6.38159
2000	6.10697
2005	6.57184
2010	6.85625
2015	6.42935
2020	5.96195
2025	5.96276
2030	5.60545
2035	5.70785
2040	5.71711
2045	5.65483
2050	5.55845
2055	5.46343
2060	5.40393
2065	5.3878
2070	5.38594
2075	5.35982
2080	5.30552
2085	5.24292
2090	5.19195
2095	5.15968
2100	5.1319