There are a lot more shark attacks than see the lighht of day in regard to reporting.
attacks by Great Whites are fewer than attacks by smller sharks but are more reported simply because they often result in fatalities.
Think about it for 1 second a 5, 6 even 7 meter Great White is a Monster of a fish, sharks will often bite somthing to see if its edible, which is especially the case with Bronze whalers and Bull sharks which are common aggressors against surfers and divers, and more so relative to Monster Tiger sharks who will bite anything or swallow anything to see if it is edible or not.
A 5,6,7 metre Great White even when biting out of investigation will likely remove a limb or even inflict even more heinous injury on the victim.
The best way to avoid shark attack is dusk and dawn when prey items are on the move and the water is cloudy, as a surfer ive always had it in my mind but also understand i am in the marine environment which is filled with critters that can cause injury ie Jellyfish, Rays, Sharks, Eels etc.
The other best way to avoid shark attack is surfing away from outcrops islets ect where seals and penguins and sea birds congregate its a buffet for apex predators and by surfing in these areas we place ourselves on the prespective menu.
Sad stories horrific stories shark and croc attacks are dreaful and a horrific way to go, my thoughts to the individual and family but there is more to the spate of shark attacks than face value and it is not Global Warming its more to do with over fishing low fish stocks mean lower numbers of shark prey items such as penguins, seals ect thus sharks are forced to forage further and wuider and sharks do roam enormous ranges yet will reside in a corridor where food sources are more available.
Surfers no doubt strike curiosity to sharks which when attacked most victims survive as the shark will rarely come back for a second bite whichn is often the case with Bull sharks and Whalers.
Sadly when a Tiger or Great White hit often the intial hit is enough to kill.