During a year when most of the state’s richest law firms did very well, they also did good — pushing up their hours spent on nonpaying public interest cases and getting more of their lawyers involved.

There also was an improvement in reporting pro bono hours. Last year, five of the Top 20 firms either did not provide data or said that they did not keep records of pro bono activity. This year, for the first time since the survey began in 1991, all the firms in the pro bono survey provided numbers.