In the Nineteenth Judicial Circuit, the official court reporters appointed and holding office under the provisions of law applicable thereto, in addition to any other salary provided by the state, shall each receive a total salary supplement in the amount of twelve thousand dollars ($12,000) per annum. This supplement shall be payable in monthly installments by each county out of that county's general fund and shall be conditioned upon adequate funds being available in the county's budget. Each county shall be responsible for paying one-third of the salary supplement due to each official court reporter.