Year	Percent
1950	9.88228
1955	9.41273
1960	9.42454
1965	8.63518
1970	10.45413
1975	12.12187
1980	9.90364
1985	7.20216
1990	7.55287
1995	7.37096
2000	7.80167
2005	7.34777
2010	5.77671
2015	5.42258
2020	4.76438
2025	5.17299
2030	5.28668
2035	5.15557
2040	5.11684
2045	5.04997
2050	4.97433
2055	4.62546
2060	4.3109
2065	4.16438
2070	4.1473
2075	4.17664
2080	4.17543
2085	4.14003
2090	4.09889
2095	4.10135
2100	4.17178