A measure to fund King County’s Medic One system is once again cruising to victory.

Proposition 1 continues funding for Medic One, which county residents use when they call 911 in medical emergencies. The levy was passing with 79% of the vote in Tuesday’s count.

The six-year levy would place a 27-cent tax on every $1,000 of a property’s value. The owner of a home assessed at $612,400, the county’s median value, would pay $165.35 a year. The levy would raise an estimated $1.1 billion over six years.

Last year, emergency-service responders tended to 209 people suffering cardiac arrest, 91 of whom died, according to Public Health – Seattle & King County. That survival rate easily outpaces national survival rates; according to the American Heart Association, more than 350,000 people suffer cardiac arrest outside of a hospital every year in the United States, and 90% of them die.

The levy covers the entire county, but Seattle runs its own emergency-services system through the fire department. The property taxes for the levy from Seattle property owners are transferred to the city and used to fund the city’s system.

The emergency-services program has been in place since 1970 and has been supported by a levy since 1979.