The San Diego City Employees Retirement System, serving about 20,000 members mainly workers at the city of San Diego, said its total assets as of June 30 passed $7 billion and that its preliminary return for the fiscal year ended in June will exceed the 13.6 percent return it had in the prior fiscal year.

Just exactly what that return is won’t be known until August when a detailed report will be released, says a spokeswoman.

The public pension fund said it also received the annual pension payments from its three plan sponsors — the city, the San Diego Unified Port District, and the San Diego County Regional Airport Authority.

The total payments came to $281 million, led by the city’s contribution of $263.6 million.