Year	Percent
1950	11.67369
1955	11.20253
1960	9.92644
1965	9.11713
1970	10.5029
1975	12.76383
1980	10.60864
1985	9.59484
1990	10.89672
1995	11.67607
2000	11.08055
2005	10.36124
2010	9.48479
2015	8.84257
2020	8.34216
2025	8.54025
2030	8.00575
2035	7.58044
2040	7.14631
2045	6.77342
2050	6.50129
2055	6.33069
2060	6.18597
2065	6.03747
2070	5.8699
2075	5.72497
2080	5.61171
2085	5.52624
2090	5.46268
2095	5.39874
2100	5.3349