Public pension funds from Rhode Island to California are struggling, but New York state found out this week that retirement contributions by governments, school districts and taxpayers would decrease in the coming fiscal year.

New York Comptroller Thomas DiNapoli announced the unexpected decrease, which will be slight, from an average of 20.9 percent of payroll to 20.1 percent for those in the Employment Retirement System and from 28.9 percent to 27.6 percent for those in the Police and Fire Retirement System.

“The New York State Common Retirement Fund’s strong gains over the last four years have mitigated some of the impact of the financial market collapse of 2008-2009,” DiNapoli said in a statement. “Strong investment performance, along with a revision in actuarial smoothing, has lowered the employer contribution rate for 2014-15.”

New York state’s pension funds are among the best funded in the country. Standard & Poor’s reported that that less than 8 percent of its liabilities were uncovered. That stands in sharp contrast with problems in places like Detroit, where pension liabilities are a major part of the city’s bankruptcy filing, and California, where unions are fighting changes to retirement systems negotiated with the state and municipalities.