Year	Percent
1950	9.319
1955	7.67578
1960	7.37181
1965	8.32891
1970	7.85303
1975	7.28476
1980	6.81028
1985	6.63959
1990	6.99778
1995	7.01487
2000	6.41329
2005	6.27608
2010	5.1113
2015	4.01034
2020	4.23471
2025	4.93922
2030	4.8498
2035	4.86737
2040	4.78087
2045	4.58285
2050	4.50127
2055	4.71256
2060	4.98315
2065	5.10358
2070	5.09236
2075	5.01939
2080	4.97287
2085	5.01677
2090	5.11431
2095	5.17445
2100	5.14783