Year	Percent
1950	5.93094
1955	7.40249
1960	8.81259
1965	8.29763
1970	6.93047
1975	6.39165
1980	6.24503
1985	7.73598
1990	8.172
1995	6.31852
2000	5.97457
2005	5.49874
2010	4.09726
2015	4.34102
2020	5.15724
2025	5.0171
2030	4.92034
2035	4.70622
2040	4.42914
2045	4.33352
2050	4.58086
2055	4.86947
2060	4.96295
2065	4.91519
2070	4.81688
2075	4.75974
2080	4.82113
2085	4.96475
2090	5.0582
2095	5.03223
2100	4.92445