Humans kill approximately 100 million sharks every year.

http://becomempowered.wordpress.com/2014/06/17/humans-kill-approximately-100-million-sharks-every-year/

Human deaths from shark statistics via the International Shark Attack File (ISAF). More information: http://bit.ly/O3bK9. In an average year, around 100 shark attacks are reported. In 2011 there were 118 recorded attacks, 17 of which were fatal.

Estimated numbers of shark deaths per year caused by humans from recent research published in the Journal Marine Policy. More information: http://bbc.in/Z7d9Fb