Year	Percent
1950	7.811
1955	10.99329
1960	11.91557
1965	11.73787
1970	9.94148
1975	7.66033
1980	7.94015
1985	8.10447
1990	8.53903
1995	8.67603
2000	6.11379
2005	5.00219
2010	5.33912
2015	6.07702
2020	7.19381
2025	6.87587
2030	6.3833
2035	5.79226
2040	5.62199
2045	5.99739
2050	6.48284
2055	6.64237
2060	6.42296
2065	6.08092
2070	5.88759
2075	5.94171
2080	6.10631
2085	6.17287
2090	6.06538
2095	5.85183
2100	5.67983