Year	Percent
1950	11.14947
1955	11.20332
1960	12.23618
1965	12.92286
1970	12.91068
1975	13.33977
1980	13.04635
1985	11.22562
1990	11.1036
1995	10.92068
2000	10.26362
2005	9.60176
2010	8.63411
2015	8.13802
2020	7.45574
2025	6.85966
2030	6.39791
2035	5.96731
2040	5.63352
2045	5.36677
2050	5.15933
2055	5.00482
2060	4.87603
2065	4.77743
2070	4.70184
2075	4.65296
2080	4.62632
2085	4.61785
2090	4.61134
2095	4.61351
2100	4.6146