Like the temperatures in a severe winter freeze, union membership continues to sink to record lows. The latest numbers indicate that 7.4% of working Americans in the private sector were union members in 2006 (BLS 2007), compared to over 30% in 1960 (Greenhouse 2007). If you include government workers, then the numbers inch up to a still-meager 12%, which is down from 12.5% in 2005 (BLS 2007).