The amount of tax revenue collected in 2001, for example, was $5,438,036. The rate was 4% so that means the amount people spent on lodging was $135,950,900. In 2002 $5,414,212 was collected, however that was at a 5% rate, making the tax base $108,284,240.
These are fiscal years running from the previous June through May. In 2004, the tax rate increase went into effect in February, so I used the 5 percent figure for the first three quarters and 6 percent for the final one. I wasn't able to find during what month the increase from 4% to 5% occurred, so I assumed the new rate was in effect for the whole fiscal year.