Year	Percent
1950	5.66814
1955	5.6564
1960	5.66044
1965	8.40021
1970	10.90865
1975	10.95307
1980	10.64466
1985	10.68182
1990	10.69864
1995	12.91695
2000	10.84224
2005	11.8242
2010	10.50716
2015	10.67434
2020	11.39071
2025	11.32317
2030	10.93377
2035	10.37571
2040	10.06041
2045	9.87747
2050	9.66744
2055	9.40142
2060	9.13022
2065	8.84529
2070	8.57528
2075	8.31541
2080	8.09312
2085	7.89261
2090	7.69713
2095	7.48871
2100	7.29534