I am looking for four-year college and university graduation rate
statistics. The data would ideally also show how the graduation rates
change with the following variables added: five-year graduation rate,
six-year graduation rate, and adjustments for transfer students (or
specific data on percentage of transfers in first two years at a
four-year higher-ed institution). We also need data on top reasons for
the dropout rate or an explanation of the trends in the data.

If you need clarifying information, please ask first. thanks.