List the name of the rates that apply to the provinces that are in the territory that obtained the greatest increase in sales with respect to the previous year.
sales of previous year refers to SalesLastYear; SalesYTD refers to year to date sales; increase in sales = DIVIDE(SUBTRACT(SalesYTD, SalesLastYear), SalesLastYear)*100
SELECT T2.Name FROM SalesTerritory AS T1 INNER JOIN StateProvince AS T2 ON T1.CountryRegionCode = T2.CountryRegionCode INNER JOIN SalesTaxRate AS T3 ON T2.StateProvinceID = T3.StateProvinceID ORDER BY (T1.SalesYTD - T1.SalesLastYear) / T1.SalesLastYear DESC LIMIT 1