Year	Percent
1950	10.13314
1955	9.79984
1960	9.51744
1965	9.31759
1970	10.68059
1975	11.1368
1980	10.86648
1985	9.82364
1990	9.13077
1995	10.24675
2000	11.58916
2005	12.21829
2010	11.50423
2015	10.23209
2020	9.92305
2025	10.64931
2030	11.05433
2035	11.09628
2040	10.65769
2045	10.13692
2050	9.92544
2055	9.93038
2060	9.87038
2065	9.62007
2070	9.26106
2075	8.92958
2080	8.71242
2085	8.56706
2090	8.38621
2095	8.14234
2100	7.84717