Year	Percent
1950	7.05946
1955	6.50388
1960	9.38553
1965	8.81402
1970	8.4896
1975	8.44451
1980	8.04469
1985	7.82733
1990	6.78577
1995	6.95704
2000	6.71808
2005	6.2885
2010	6.24873
2015	6.33836
2020	6.31105
2025	6.06407
2030	5.8606
2035	5.74686
2040	5.7328
2045	5.78656
2050	5.80562
2055	5.74908
2060	5.65721
2065	5.58672
2070	5.55986
2075	5.55789
2080	5.53953
2085	5.49289
2090	5.42469
2095	5.35875
2100	5.32008