60-percent

The city of Philadelphia's sewer system is 60-percent combined, and the city goes to great lengths to reduce the amount of storm water flowing into the system.

Robin Madel: World Water Week and Urban Water Infrastructure Robin Madel 2011

The city of Philadelphia's sewer system is 60-percent combined, and the city goes to great lengths to reduce the amount of storm water flowing into the system.

Robin Madel: World Water Week and Urban Water Infrastructure Robin Madel 2011

A 60-percent majority of students said they hope to transfer to a four-year college -- although actual transfer rates are far lower than that -- while one-third said they were only interested in an associate degree.

Survey: Community college students prize Internet access over teachers Daniel de Vise 2011

The city of Philadelphia's sewer system is 60-percent combined, and the city goes to great lengths to reduce the amount of storm water flowing into the system.

Robin Madel: World Water Week and Urban Water Infrastructure Robin Madel 2011

Mikulski has 60-percent support or better among voters of every age range.

First Click, MarylandMikulski maintains wide lead in U.S. Senate race John Wagner 2010

Florida voters, in a rare check on Republicans 'success in taking control of many states' redistricting processes, surpassed the 60-percent threshold to set strict nonpartisan rules on new legislative line-drawing next year.

Hans Johnson: Wave of Voter Anger Leaves Damage, Opportunities Hans Johnson 2010

Florida voters, in a rare check on Republicans 'success in taking control of many states' redistricting processes, surpassed the 60-percent threshold to set strict nonpartisan rules on new legislative line-drawing next year.

Hans Johnson: Wave of Voter Anger Leaves Damage, Opportunities Hans Johnson 2010

CONAN: And there are some governance issues, as well, including a measure, for example, in California to the state budget by ballot initiative, has to be approved by 60-percent majorities in both houses of the legislature.

Taxes, Budgets And UFOs: State Ballot Initiatives 2010

Florida voters, in a rare check on Republicans 'success in taking control of many states' redistricting processes, surpassed the 60-percent threshold to set strict nonpartisan rules on new legislative line-drawing next year.

Hans Johnson: Wave of Voter Anger Leaves Damage, Opportunities Hans Johnson 2010

The city of Philadelphia's sewer system is 60-percent combined, and the city goes to great lengths to reduce the amount of storm water flowing into the system.

Robin Madel: World Water Week and Urban Water Infrastructure Robin Madel 2011