Year	Percent
1950	6.27855
1955	7.28421
1960	8.58748
1965	7.87699
1970	7.72599
1975	7.54675
1980	7.85344
1985	7.29651
1990	6.03801
1995	5.76581
2000	6.19522
2005	6.52856
2010	6.28115
2015	5.8183
2020	5.80895
2025	5.45995
2030	5.53009
2035	5.54198
2040	5.48493
2045	5.39792
2050	5.316
2055	5.26567
2060	5.25933
2065	5.26874
2070	5.25061
2075	5.19778
2080	5.13467
2085	5.08498
2090	5.05516
2095	5.02836
2100	5.00183