(2) The general obligation bonds and general obligation interim financing notes issued pursuant to ORS 223.235 shall be determined by deducting from the sum total of outstanding general obligation bonds and general obligation interim financing notes issued pursuant to ORS 223.235, the aggregate of sinking funds or other funds applicable to the payment thereof, less the aggregate of overdrafts, if any, in the related improvement bond interest fund. [Amended by 1955 c.28 §1; 1955 c.686 §1; 1959 c.653 §7; 1963 c.545 §2; 1965 c.282 §3; 1985 c.441 §1; 1991 c.459 §351; 1991 c.902 §24]