The year 2015 turned into a takeover frenzy marked by record low interest rates and a desire to get big fast. No sector was hotter than health care, which saw unprecedented activity in mergers and acquisitions. Here's some numbers to put 2015 into perspective.

The year 2015 turned into a takeover frenzy marked by record low interest rates and a desire to get big fast. No sector was hotter than health care, which saw unprecedented activity in mergers and acquisitions. Here's some numbers to put 2015 into perspective.

$1.99 trillion: The value of all mergers and acquisitions completed or pending so far this year across all sectors in the U.S.

1 in 5: The ratio of total dollars spent on health care companies.

245 percent: That's how much the combined value of all health care deals increased compared with just five years ago, well over three times the total value.

277: That's how many more M&A deals were pursued five years ago, showing how massive health care deals have become.

$451 billion: The total value of M&A in health care, which was greater than all M&A activity in the telecom and energy sectors combined.

Source: Dealogic