"Year" "Effect" "Impact" "Effect/Impact"
1974 1279 34 38.05
1975 1419 24 58.18
1976 1375 29 48.06
1977 1352 30 45.01
1978 1318 36 36.36
1979 1304 40 32.28
1980 1329 42 31.32
1981 1326 43 30.61
1982 1379 50 27.61
1983 1340 48 27.85
1984 1327 52 25.53
1985 1340 50 26.71
1986 1346 55 24.59
1987 1328 61 21.65
1988 1300 65 19.95
1989 1256 71 17.63
1990 1238 76 16.22
1991 1214 79 15.4
1992 1209 82 14.83
1993 1167 90 12.91
1994 1168 92 12.73
1995 1146 102 11.25
1996 1147 108 10.67
1997 1126 112 10.05
1998 1095 122 8.96
1999 1081 130 8.33
2000 1065 141 7.53
2001 1037 152 6.81
2002 1020 161 6.35
2003 1019 175 5.81
2004 991 183 5.4
2005 987 190 5.21
2006 974 205 4.75
2007 950 211 4.49
2008 946 227 4.18
2009 924 236 3.92
2010 920 248 3.71
2011 906 261 3.47
2012 912 278 3.27
2013 930 286 3.25
2014 934 298 3.14