Here's a 2015 quote from economist.com. Budgets expanded beyond belief from $1m in 1990 to nearly $450m in 2013. And the number of times they were used exploded 17 times. 3,000 in 1980 to 50,000 times.

→ The American Civil Liberties Union found that the value of military equipment used by American police departments has risen from $1m in 1990 to nearly $450m in 2013. The equipment has been used. In 1980 SWAT teams across America were deployed around 3,000 times. Deployments are estimated to have risen nearly seventeen-fold since, to 50,000 a year.

Of course - 2015 was ten years ago so things have surely gotten even worse.