2008, 2006, 2000, and 1971 data updated

Just a quick note to document a few changes to the database where the SPC has modified data for past years:

A number of changes were made to 2008 records:

As a result of the modifications to 2008 data, the count of tornadoes for the year is now 1690 (from 1689), while the total count since 1950 is 53254 (from 53253.)