Year	Percent
1950	9.43405
1955	10.18271
1960	10.05231
1965	10.00367
1970	10.45554
1975	12.63176
1980	13.38818
1985	11.83872
1990	10.68011
1995	8.95702
2000	6.7827
2005	8.68973
2010	7.69737
2015	6.89387
2020	7.07746
2025	7.21733
2030	5.79377
2035	6.01739
2040	5.76514
2045	5.85204
2050	6.09718
2055	6.19699
2060	5.95371
2065	5.62831
2070	5.47574
2075	5.44599
2080	5.45986
2085	5.44697
2090	5.34419
2095	5.19195
2100	5.08964