Year	Percent
1950	19.65131
1955	18.53142
1960	18.64284
1965	19.53335
1970	17.74879
1975	14.41661
1980	14.09009
1985	14.96202
1990	13.77377
1995	13.87253
2000	13.38022
2005	13.19238
2010	12.80468
2015	11.8886
2020	10.86017
2025	10.62689
2030	10.68069
2035	10.58777
2040	10.17027
2045	9.4565
2050	8.74767
2055	8.30892
2060	8.16077
2065	8.04615
2070	7.76
2075	7.29908
2080	6.81004
2085	6.44304
2090	6.2459
2095	6.13387
2100	5.98949