Global corporate bond defaults reached a milestone 100 so far in 2016 with the addition of four defaulters this week, Standard & Poor’s said Thursday.

That puts the current tally — a number led by U.S. companies — up more than 50% from the same time last year. In fact, the last time the global count was higher at this point in the year was in 2009, during the financial crisis, when it reached 177.

As for S&P-recorded defaults so far in 2016, “67 are based in the U.S., 18 in emerging markets, nine in the other developed nations — Australia, Canada, Japan and New Zealand — and six in Europe,” said Diane Vazza, head of S&P global fixed income research.

By comparison, “In 2015, 62 issuers defaulted during this period; 32 were based in the U.S., 14 in emerging markets, 12 in Europe and four in the other developed countries,” she said.

S&P Global Ratings withdrew its ratings this week on two issuers, both U.S.-based, prior to their defaulting. Of the remaining defaults, one was from the U.S. oil and gas sector and the other was confidential.

In its own U.S.-focused report out this week, rival ratings firm Fitch said struggling energy companies propelled the rate of high-yield bond defaults in the first half of 2016 to their steepest in some six years, and said the rate will climb further because more defaults are imminent.

Read:Worst of high-yield bond defaults is yet to come — blame energy

The energy sector, plagued with global oversupply and uncertain global demand, has had to adjust to multi-year-low crude prices that hurt U.S. drillers especially, because of higher-cost drilling methods. The economic uncertainty posed by the U.K.’s decision to leave the European Union has also caused economists to reevaluate global economic growth projections, and some say it’s too early to know the full reach of that decision.

Read:High-yield debt issuers show first liquidity improvement in a year

While it’s true that select sectors — namely, energy and metals/mining — remain most vulnerable to missed payments on their mostly high-yield, or junk, bonds, their elevated risks can equate to higher borrowing costs for other industries, too, and at a time when the earnings picture remains muddied by global economic sluggishness.

Downgrades have not been exclusive to energy. Among the latest companies knocked for a downgrade, the corporate credit rating on Frisco, Texas-based telecom infrastructure services provider Goodman Networks Inc. was cut to ‘SD’ from ‘CCC+’ after the issuer missed the interest payments on its credit facilities and entered into debt restructuring negotiations with its lenders, S&P said.