Year	Percent
1950	8.19244
1955	10.79047
1960	6.81044
1965	7.44386
1970	8.95478
1975	8.32738
1980	7.6914
1985	6.62264
1990	7.04319
1995	7.24218
2000	7.75652
2005	7.32745
2010	6.00234
2015	4.73148
2020	4.44391
2025	5.54389
2030	5.80567
2035	5.69248
2040	5.37698
2045	5.0151
2050	4.88632
2055	5.1187
2060	5.46042
2065	5.60572
2070	5.50607
2075	5.32007
2080	5.21353
2085	5.25583
2090	5.38045
2095	5.44784
2100	5.39603