As depicted in the chart below, the largest source of funding for the County's three retirement systems are investment returns. Since 2000, investment income has made up between 54 and 60 percent of income for the systems. The next-largest source of funding is the County's employer contributions to the systems, which comprise between 29 and 37 percent of the income for the systems. The last source of funding, contributions from employee members of the systems, make up between 9 and 11 percent of income.
NOTE: The percentages noted above for County and employee contributions are calculated as percentages of total income for the systems from 2000 through 2018. These numbers are not the same as the contribution rate numbers provided elsewhere, which are calculated as a percentage of covered payroll.