Upon every person engaging or continuing within this City in the business of producing for sale, profit or commercial use any natural resource product, the amount of such tax shall be equal to the value of articles produced as shown by the gross proceeds derived from the sale thereof by the producer, except as otherwise provided, multiplied by the respective rates as follows: coal, three-fifths of one percent (.60%); limestone or sandstone, quarried or mined, nine- tenths of one percent (0.90%); oil, one and four-fifths percent (1.80%); natural gas in excess of the value of five thousand dollars ($5,000), three and three-fifths percent (3.60%); blast furnace slag, one and four-fifths percent (1.80%); sand, gravel or other mineral product, not quarried or mined, one and four-fifths percent (1.80%); timber, nine-tenths of one percent (.90%); other natural resource products, one and one-fifth percent (1.20%). The measure of this tax is the value of the entire production in this City, regardless of the place of sale or the fact that delivery may be made to points outside the City. (3-2-04)