Year	Percent
1950	6.83844
1955	7.01066
1960	8.31656
1965	8.72208
1970	7.56256
1975	7.30671
1980	7.72299
1985	7.66493
1990	7.14335
1995	6.14761
2000	5.2348
2005	5.69854
2010	6.36203
2015	6.3339
2020	5.84647
2025	5.8496
2030	5.1524
2035	5.29637
2040	5.59348
2045	5.74132
2050	5.67959
2055	5.51843
2060	5.36328
2065	5.31891
2070	5.38955
2075	5.45609
2080	5.43704
2085	5.34131
2090	5.23301
2095	5.17098
2100	5.16173