Year	Percent
1950	10.68015
1955	10.44798
1960	9.79953
1965	9.73648
1970	9.90308
1975	11.18998
1980	12.21901
1985	13.18887
1990	11.06421
1995	10.53476
2000	11.22453
2005	9.48581
2010	10.38456
2015	10.31791
2020	10.70828
2025	10.74317
2030	9.8614
2035	8.96683
2040	8.79925
2045	8.96954
2050	9.08723
2055	8.91333
2060	8.38962
2065	7.78795
2070	7.42
2075	7.34765
2080	7.33858
2085	7.18488
2090	6.85146
2095	6.46002
2100	6.16418