Hurricane seasons cycle up and down. Remember there was 2005 which had Katrina then 2006 was incredibly in active.
2006 was only inactive compared to 2005. It had about average activity.
14/7/3
It was well below average. 2006 was 10/5/2
Even look recently. We had that 2010-12 stretch where there were 19 storms each year
But then 2013-15 were very inactive
13 was 14/2/0 (most were extremely weak. Strongest was a cat 1$
14 was 8/6/2
15 was 11/4/2
That seems to be a bit of cherry picking.
Since records have been kept, it was a season of average activity. Cyclonic activity are on cycles that last decades, so yes within a cycle a season of average activity will appear either above or below average. But even over the time period you're citing it wasn't incredibly inactive.
