Cause for pause for concern

Estimated death toll September 11 attacks in the US:
2996.

Estimated death toll 7 July 2005 London bombings:
56.

Estimated death toll 2004 Madrid train bombings:
191.

Estimated death toll November 2015 Paris attacks:
137.

Estimated death toll in Britain in 2015 for people who were not able to heat their cold homes:
9000.