According to a 2012 blog article at Mondoweiss, the Israel Defense Forces (IDF) were exaggerating the numbers of deaths from Hamas rockets: (abbreviated)
Number of rocket/mortar fatalities by year, 2006–2011
IDF claim Established
2006 9 4
2007 10 2
2008 15 8
2009 2 0
2010 5 1
2011 3 2
For 2006, it is unknown how the IDF transformed four rocket fatalities into nine.
For 2007, it is unknown how the IDF transformed two fatalities into ten.
For 2008, it is unknown how the IDF transformed eight fatalities into fifteen.
For 2009, there were no deaths in Israel from Gaza rockets or mortars. The only way to claim two fatalities would be to include the deaths of two soldiers engaged in a military invasion inside the Gaza Strip, which would be misleading for the message being conveyed by the infographic.
For 2010, it is unknown how the IDF transformed one fatality into five.
Thus, for 2011, the IDF number is correct if we include an anti-tank missile strike on April 7.
Conclusion
In the infographic, all of the IDF’s fatality numbers are exaggerated, with the exception of the fatality number for 2011.
So whose numbers are accurate (if any)?