Wisconsin‘s public sector unions continue to struggle to retain members in the wake of Gov. Scott Walker’s reforms, new Labor Department filings indicate. American Federation of State, County and Municipal Employees District Council 48, one of the union’s four main branches in the state, has seen its membership slip to just 3,405 by the end of 2013. It had more than 9,000 members as recently as 2010.

Walker’s reforms ended the state’s practice of automatically deducting membership dues from public sector workers on behalf of their union and for the first time, allowed those workers to opt out of being union members. Effectively, he applied right-to-work rules to those unions. The reforms also required the unions to submit to annual recertification votes and limited collective bargaining to just wages.