"Volunteering in America: 2007 City Trends and Rankings" uses volunteer data collected by the U.S. Census Bureau and Bureau of Labor Statistics from 2004-2006. It ranks and includes profiles for 50 of the largest cities including the volunteer rate; the types of organizations through which residents serve; their main volunteering activities, the average hours per year and volunteer rates for age and gender demographic groups, and key trends and highlights. The report also analyzes social and demographic trends affect city volunteer rates and finds that there are four key drivers of volunteering: community attachment; commuting times, high school graduation levels and poverty; and the prevalence of nonprofits and their capacity to retain volunteers from year to year. The information on volunteering at the local level can help local governments, community leaders, service organizations, and volunteers nationwide develop a volunteer growth strategy, set goals to increase the level of individual engagement in volunteer activities, and build the infrastructure of nonprofits and communities to support more volunteer opportunities