Year	Percent
1950	9.38806
1955	9.89143
1960	9.60011
1965	9.52213
1970	9.88627
1975	8.9662
1980	8.77441
1985	8.02792
1990	6.78152
1995	5.61321
2000	5.18737
2005	5.03711
2010	5.00755
2015	4.73171
2020	4.32365
2025	3.86163
2030	3.66096
2035	3.73931
2040	3.86604
2045	3.93561
2050	3.90944
2055	3.83033
2060	3.78161
2065	3.84953
2070	4.00035
2075	4.15407
2080	4.23003
2085	4.23034
2090	4.20116
2095	4.20465
2100	4.26096