Non-hazardous 2019 2018
KSU's proportion of the net OPEB liability $ 5,398 $ 6,178
KSU's proportionate share of the net OPEB liability 0.23% 0.24%
KSU's covered payroll $ 3,583 $ 3,888
KSU's proportionate share of the net OPEB liability as a share of its covered payroll 150.66% 158.90%
Plan fiduciary net position as a percentage of total OPEB liability 27.32% 24.40%
Hazardous 2019 2018
KSU's proportion of the net OPEB liability (62) 3
KSU's proportionate share of the net OPEB liability 0.19% 0.05%
KSU's covered payroll $ 61 $ 79
KSU's proportionate share of the net OPEB liability as a share of its covered payroll (101.64)% 3.80%
Plan fiduciary net position as a percentage of total OPEB liability 106.83% 98.80%
Note: This table represents data that is one year in arrears.
Changes in assumptions: For fiscal year 2019, the discount rate used to measure the total Non-hazardous OPEB liability was 5.86%, which was reduced from the 6.90% discount rate used in the prior year. The discount rate used to measure the total Hazardous OPEB liability was 5.88%, which was increased from the 5.87% discount rate used in the prior year.
For fiscal year 2018, the assumed investment rate of return was changed from 7.50% to 6.25%. The inflation assumption was changed from 3.25% to 2.30%. The payroll growth assumption was changed from 4.00% to 0.00%.
Changes in benefit terms: However, during the 2018 legislative session, House Bill 185 was enacted, which updated the benefit provisions for active members who die in the line of duty. The system shall now pay 100% of the insurance premium for spouses and children of all active members who die in the line of duty. The total OPEB liability as of June 30, 2018, is determined using these updated benefit provisions.
67.