The following unemployment tax rate schedule is in effect for the calendar year 2019 in State A, which uses the reserve-ratio formula in determining employer contributions: Reserve Ratio Contribution Rate 0.0% or more, but less than 1.0% 6.7% 1.0% or more, but less than 1.2% 6.4% 1.2% or more, but less than 1.4% 6.1% 1.4% or more, but less than 1.6% 5.8% 1.6% or more, but less than 1.8% 5.5% 1.8% or more, but less than 2.0% 5.2% 2.0% or more, but less than 2.2% 4.9% 2.2% or more, but less than 2.4% 4.6% 2.4% or more, but less than 2.6% 4.3% 2.6% or more, but less than 2.8% 4.0% 2.8% or more, but less than 3.0% 3.7% 3.0% or more, but less than 3.2% 3.4% 3.2% or more 3.1% Hyram Company, which is located in State A, had an average annual payroll of $860,000 for the three 12-month periods ending on June 30, 2018 (the computation date for the tax year 2019). As of June 30, 2018, the total contributions that had been made to Hyram Company's reserve account, in excess of the benefits charged, amounted to $17,630. Compute the following: a. Hyram Company's reserve ratio for 2018. Round your answer to two decimal places.