Year	Percent
1950	8.5107
1955	10.40208
1960	11.78502
1965	10.26869
1970	8.07255
1975	7.99664
1980	7.69998
1985	8.08012
1990	7.75211
1995	5.89665
2000	4.62648
2005	4.65961
2010	5.37178
2015	6.07104
2020	5.88321
2025	5.49199
2030	5.02651
2035	4.86401
2040	5.12929
2045	5.514
2050	5.66867
2055	5.52569
2060	5.28334
2065	5.16609
2070	5.24948
2075	5.44114
2080	5.55233
2085	5.49871
2090	5.34059
2095	5.19655
2100	5.17027