Year	Percent
1950	7.7637
1955	7.95892
1960	5.94773
1965	6.53468
1970	6.53645
1975	6.7201
1980	6.37442
1985	6.11608
1990	6.36986
1995	6.29586
2000	6.6341
2005	6.83622
2010	5.29542
2015	4.04033
2020	4.4779
2025	5.46383
2030	5.18799
2035	5.17133
2040	4.93103
2045	4.55391
2050	4.46999
2055	4.73072
2060	5.00161
2065	5.06444
2070	4.94825
2075	4.78677
2080	4.70359
2085	4.76736
2090	4.8975
2095	4.96321
2100	4.90834