Year	Percent
1950	6.96547
1955	5.88658
1960	7.5283
1965	9.00558
1970	8.65216
1975	7.13129
1980	6.56402
1985	6.578
1990	8.15064
1995	8.60667
2000	6.72946
2005	6.34329
2010	5.75904
2015	4.29584
2020	4.55526
2025	5.42579
2030	5.31387
2035	5.23334
2040	5.00345
2045	4.69294
2050	4.578
2055	4.83465
2060	5.14896
2065	5.26177
2070	5.21018
2075	5.08319
2080	4.98852
2085	5.02043
2090	5.14826
2095	5.23387
2100	5.20605