Here in Fla. we had a demonstrable reduction in violent crime after the state became a "Shall Issue" state, IIRC.
That was in 1987? Sure, violent crime dropped then, and then went up in 1988, 1989, and 1990.
Here is the table, but it is better seen here...
http://www.fdle.state.fl.us/FSAC/UCR/1996/trends.aspViolent Crime in Florida
Year Total Violent
Crime Volume % Change Total Violent
Crime Rate Per
100,000 Population % Change
1971 38,572 0.0 547.80 0.0
1972 40,248 4.3 540.90 -1.3
1973 46,430 15.4 591.80 9.4
1974 54,852 18.1 665.00 12.4
1975 57,663 5.1 679.60 2.2
1976 54,543 -5.4 637.80 -6.2
1977 57,916 6.2 664.40 4.2
1978 65,784 13.6 733.60 10.4
1979 73,866 12.3 799.00 8.9
1980 94,068 27.3 982.00 23.0
1981 98,090 4.3 971.40 -1.10
1982 93,406 -4.8 900.30 -7.3
1983 88,298 -5.5 833.70 -7.4
1984 95,368 8.0 872.50 4.7
1985 106,980 12.2 948.50 8.7
1986 120,977 13.1 1,037.70 9.4
1987 123,030 1.7 1,021.50 -1.6
1988 138,343 12.4 1,114.10 9.1
1989 145,473 5.2 1,136.70 2.0
1990 160,554 10.4 1,220.90 7.4
1991 158,181 -1.5 1,198.70 -1.8
1992 161,137 1.9 1,200.30 0.08
1993 161,789 0.4 1,188.90 0.9
1994 157,835 -2.4 1,137.20 -4.3
1995 150,208 -4.8 1,061.60 -6.6
1996 151,350 0.8 1050.20 -1.1
It is hard to say that the drop in violent crime was because of concealed carry laws, LOL.
The same holds for Texas in 1996. It is lauded as showing a remarkable drop in crime when CHLs were allowed, but then again, crime dropped in some 43 states in 1996, including some that did not have concealed carry or that were anti concealed carry.
http://www.fbi.gov/ucr/Cius_97/96CRIME/96crime2.pdf
So the demonstrable reduction in violent crime in Florida is a bit dubious as are the claims of crime reduction because of concealed carry. At best, what is evident is an nonunderstood correlation, but no evidence of causation.