Year,Exploit_ratio
1964,0.9426
1965,0.6492
1966,0.2897
1967,4.0783
1968,1.6239
1969,1.2741
1970,1.1728
1971,1.7839
1972,1.2523
1973,1.6096
1974,5.1541
1975,1.5427
1976,3.4718
1977,0.8829
1978,1.7869
1979,1.5584
1980,1.1168
1981,3.1657
1982,10.1486
1983,3.3159
1984,1.6427
1985,1.2903
1986,1.3585
1987,1.9177
1988,1.2262
1989,3.7528
1990,4.6033
1991,4.6924
1992,16.4185
1993,5.6938
1994,10.3101
1995,15.0529
1996,2.3015
1997,1.5959
1998,19.3374
1999,3.4202
2000,7.8305
2001,4.8014
2002,1.8144
2003,1.8351
2004,3.5492
2005,2.3225