The charts that show volunteer hour trends and top volunteers are viewable in the Charts tab of the Log Hours section.
To decide which charts to display and which to not visit the:
Note for charts: They will by default display the last 6 month peroid for hours. This date is adjustable while in the charts themselves, but once one moves from the page it will reset to the last 6 months.
Charts can also be embedded on your own off Track it Forward site. The embed codes are in the Promote tab. http://www.trackitforward.com/site/76601/manage/promote