Year	Percent
1950	9.72957
1955	7.94454
1960	8.08981
1965	8.07525
1970	7.88511
1975	8.49075
1980	8.73306
1985	8.4528
1990	8.52071
1995	8.08177
2000	6.47944
2005	5.27718
2010	4.70817
2015	4.51757
2020	4.95478
2025	5.34883
2030	4.78215
2035	4.41281
2040	4.11058
2045	4.0193
2050	4.14754
2055	4.38633
2060	4.57225
2065	4.58772
2070	4.51099
2075	4.46248
2080	4.48191
2085	4.55601
2090	4.63698
2095	4.6655
2100	4.6328