Interest groups are giving a growing amount of campaign contributions to the chairmen of the committees of Congress that regulate their area of interest, according to a new report.

The Center for Responsibility and Ethics in Washington (CREW) study compared industry contributions, including both PAC and individual contributors, to the House standing committee chairman and their ranking members. Contributions in the 2009-2010 cycle were compared to the 2011-2012 cycle.

CREW’s analysis showed that after control of the House switched, some 2010 Democratic committee chairman saw campaign contributions plummet from industries that their committee regulates, while some Republican committee chairman saw an increase in industry contributions.

For example, Rep. John Kline, R-Minn., who took over the House Committee on Education and the Workforce in 2011, received $305,159 in the 2012 cycle, a 155% increase from the 2010 cycle. His counterpart, Rep. George Miller, D-Calif., saw his industry contributions drop by 52%.

Rep. Doc Hastings, R-Wa., who took over the House Committee on Natural Resources in 2011, received $309,771 in the 2012 cycle, a 104% increase. His counterpart, Rep. Edward Markey, D-Mass., saw his industry contributions drop by 42%.

View the CREW press release, and full report.