Years for which no ordinances were found:

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1893, 1894, 1897, 1898, 1899, 1902, 1903, 1904, 1905, 1909, 1910, 1911, 1912, 1913, 1914, 1915, 1916, 1917, 1918, 1947, 1953, 1957, 1962, 1963, 1965, 1966, 1967, 1969, 1970, 1980

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In other years only one ordinance was found.