A new survey released Tuesday by litigation funder Burford Capital Ltd. has found that litigation finance is growing increasingly popular among large law firms.

More than a quarter of respondents at law firms—28 percent—said that their firms have turned to outside funders to underwrite cases, according to the survey. That proportion is more than twice the percentage two years ago and four times the percentage in 2013. And it’s only likely to increase, given that nearly half of law firm respondents said that they are confident that firms will increasingly utilize outside finance to grow their litigation dockets.