Over last 20 years, annual fires in the US declined by about 50% while career firefighters increased more than 50%? [ Full title ]. while the annual number of fires in the US declined by 47% between 1983 and 2013 (from more than 2.3 million to 1.24 million), the number of paid career firefighters increased by 56.5% (from 226,600 to 354,600), according to data from the National Fire Protection Association here and here. In 1983 there were more than 10 fires in the US per career firefighter, but by 2013 there were fewer than 3.50 fires per paid career firefighter....