You are given:
i. Policies are written uniformly throughout the year.
ii. Policies have a term of 6 months.
iii. The following rate changes have occurred:
Date: October 1, CY1
Amount: +7%
Date: July 1, CY2
Amount: +10%
Date: September 1, CY3
Amount: -6%
Rates are currently at the September 1, CY3 level.
Calculate the on-level factor needed to adjust CY2 earned premiums to the current rate level.