Seattle City Light 2016 ANNUAL REPORT | Audited Financial Statements 55 THE CITY OF SEATTLE—CITY LIGHT DEPARTMENT NOTES TO FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED DECEMBER 31, 2016 AND 2015 - 55 - valuations. Contribution rates and amounts were as follows as of the reporting dates, December 31, 2016 and December 31, 2015, and the measurement dates, December 31, 2015 and December 31, 2014: ($ in millions) Employer Most members City Department 2016 15.29% 10.03% $108.5 $23.9 2015 15.73% 10.03% $101.0 $24.9 Contributions Rates Amounts Effective January 1, 2017, the city will implement a new defined benefit retirement plan SCERS II for new employees hired on or after January 1, 2017. These changes have no effect on net pension liability or employee contributions as of December 31, 2016. Net Pension Liability –The Department reported a liability of $317.8 million and $271.8 million for its proportionate share of net pension liability as of December 31, 2016 and December 31, 2015, respectively. The Department’s proportion of the NPL as of December 31, 2016 and December 31, 2015 was based on contributions to SCERS during the fiscal year ended December 31, 2015 and December 31, 2014, respectively. The Department’s proportionate share percent was 24.46% and 24.53% for the years ended December 31, 2015 and December 31, 2014, respectively. The net pension liability was measured as of December 31, 2015 and December 31, 2014, and the total pension liability used to calculate the net pension liability was based on an actuarial valuation as of December 31, 2014, rolled forward to December 31, 2015 and December 31, 2014, respectively. In April, 2016, there was a transfer of 115 employees from Seattle City Light to the newly created Seattle Information Technology department. Employer pension contributions for transferred employees continued to be recognized as a Seattle City Light expense through December 31, 2016 and are reflected in our deferred outflows of resources herein. This transfer will affect Seattle City Light’s proportionate share of pension expense in 2017, but does not affect the net pension liability as of December 31, 2016.