After a shark attack incident, Florida Museum of Natural History at the University of Florida decided to create some data sheets on the amount of shark attacks that has happened between 2005 and 2014. The graph above is just one of few graphs. It was hard for researchers to exactly tell the accurate amount of attacks, but they were able to tell that the majority of attacks were dealt by Great White sharks, followed by tiger sharks, and then bull sharks. Based on the graph, one can see that since 2005, the amount of attacks had increased, reached a plateau by 2012, and then has started to decrease. One can say that a factor of the increased shark attacks was due to the popularity of surfing increasing over some period of time, as it is known that sharks tend to spontaneously jump an attack preys. Based on the graph, you can assume that after the high amount of attacks in 2007, people had decided to stay out of the water the following year, and in the end did not notice many incidents. After, they decided to enter back, thus increasing the number of victims. These are nothing but speculations, but if one knows about Florida and shark attacks, some things will correlate.