Year	Percent
1950	12.35535
1955	12.79842
1960	12.71604
1965	11.28405
1970	11.86189
1975	12.11253
1980	12.26785
1985	12.1257
1990	12.36732
1995	14.40703
2000	14.80416
2005	12.5078
2010	11.61628
2015	12.62444
2020	13.10182
2025	12.31324
2030	11.51152
2035	10.86575
2040	10.45179
2045	10.19824
2050	9.89586
2055	9.46054
2060	8.96018
2065	8.51662
2070	8.17047
2075	7.88728
2080	7.60351
2085	7.27385
2090	6.94736
2095	6.65859
2100	6.411