Oil prices may be on the mend after collapsing to a 13-year low earlier this year, but the damage in the energy industry only seems to be spreading.

For an increasing number of companies that enjoyed triple-digit prices in the summer of 2014, the bounce back to $44 a barrel is too little, too late.

At last check, some 69 North American oil and gas producers have filed since the beginning of 2015, according to a recent report from law firm Haynes and Boone.

April, however, was the worst month of all, with 11 new Chapter 11 filings.

To put the carnage in perspective, the Visual Capitalist blog crunched the Haynes and Boone data to create this telling infographic, which was highlighted as “the chart of the day” in the “Need to Know” blog.

There were nine bankruptcies in the first two months of 2016, and none of them had debts topping $200 million. In April, however, 11 companies filed, and four of them had debts of more than $1 billion, including Ultra Petroleum’s US:UPLMQ $3.9 billion.

In total, debt for all the April filers reached $14.9 billion, compared with the $17.2 billion for the 42 bankrupt energy companies combined for all of 2015.

In the U.S. alone, the number of bankruptcies in the oil sector has reached 59, which is closing in on the 68 filings that were triggered by the telecom bust back in 2002, according to Reuters. A report from Deloitte earlier this year concluded that about 175 companies are at risk of insolvency.