Year	Percent
1950	8.99528
1955	8.59446
1960	8.63577
1965	8.37931
1970	8.7175
1975	8.85991
1980	7.95269
1985	8.35562
1990	8.51881
1995	7.58547
2000	7.59846
2005	7.72588
2010	7.31344
2015	6.87872
2020	6.59025
2025	6.379
2030	6.19779
2035	6.03325
2040	5.84614
2045	5.63489
2050	5.44561
2055	5.30522
2060	5.20141
2065	5.109
2070	5.02319
2075	4.9432
2080	4.87193
2085	4.81306
2090	4.77911
2095	4.75191
2100	4.71902