You clearly didn't read the source. Cruz claimed that there was a sudden, sharp spike in the statistics coinciding with the gun buy-back in 1996-1997, which isn't true.
If you're going to try and discredit a statement that another person has made, the least you can do is actually read the source provided.
No, I think it was you who misinterpreted the data. Crime, in particularly violent crime, don't have sudden spikes in year over year statistics, but gradually increase/decrease over time. That is how statistics work. You can report on the data year over year all you want, but in statistics you have to look for trends. In 1993, before the gun buyback was even a conceivable possibility, rapes were at 69 (I assume that it was per 100,000 since
@Johnnypenso didn't link to any reports here, I'll grant you that much.) 1996 was when the buyback program went into effect, and Rapes were at 79.4, that is an increase of 15% over three years.
Now look what happens when you expand the trend, say from 1996 to 2003, as it is the next waypoint on the chart. Rapes in 2003 were at a staggering 90.3. That is a 30% increase from 1993 levels, and 13% increase from 1996 levels.
Regardless of what you may/may not believe, Ted Cruz did tell a half truth here. No, Rapes did not have the "sudden spike" that many of us may think that the term means, but it did increase 30% over three years before the gun buyback program went into effect, and six years after it did. That's a trend, sir.