Year	Percent
1950	9.9628
1955	9.8394
1960	9.77334
1965	10.08651
1970	9.43715
1975	9.64157
1980	8.55279
1985	5.95908
1990	6.23975
1995	5.85076
2000	7.10473
2005	5.70125
2010	3.66297
2015	4.101
2020	3.82713
2025	4.30534
2030	4.55378
2035	4.54331
2040	4.33751
2045	4.15574
2050	3.91115
2055	3.79214
2060	3.81618
2065	3.8603
2070	3.88962
2075	3.87445
2080	3.84749
2085	3.8514
2090	3.89368
2095	3.96653
2100	4.02858