Year	Percent
1950	9.73215
1955	9.51032
1960	8.65624
1965	9.13395
1970	9.66934
1975	10.16791
1980	12.2893
1985	10.57172
1990	10.20337
1995	8.88895
2000	9.15303
2005	8.94208
2010	8.78709
2015	7.64802
2020	5.99738
2025	6.25182
2030	6.20423
2035	6.04093
2040	5.84135
2045	5.56886
2050	5.2809
2055	5.1081
2060	5.11119
2065	5.16465
2070	5.14752
2075	5.07562
2080	4.98971
2085	4.93612
2090	4.92918
2095	4.95331
2100	4.96413