Wilmer Cutler Pickering Hale and Dorr’s profits per partner climbed by about 7 percent last year and gross revenue dipped slightly, the firm said Monday.

The firm’s PPP rose from $1.08 million to $1.16 million in 2009, an increase that William Perlstein, co-managing partner of the firm, attributed to “at least a dozen” partners leaving the firm to join the Obama administration. The firm’s revenue dropped 1.5 percent, going from $955 million in 2008 to $941 million. The revenue per lawyer also fell by 1.8 percent to $1.01 million.