| Years | Name | Political Party |
| 1721-42 | |
| 1742-43 | |
| 1743-54 | |
| 1754-56; 1757-62 | |
| 1756-57 | |
| 1762-63 | |
| 1763-65 | |
| 1765-66; 1782 | |
| 1766-68 | |
| 1768-70 | |
| 1770-82 | |
| 1782-83 | |
| 1783; 1807-9 | |
| 1783-1801; 1804-6 | |
| 1801-4 | |
| 1806-7 | |
| 1809-12 | |
| 1812-27 | |
| 1827 | |
| 1827-28 | |
| 1828-30 | |
| 1830-34 | |
| 1834; 1835-41 | |
| 1834-35; 1841-46 | |
| 1846-52; 1865-66 | |
| 1852; 1858-59; 1866-68 | |
| 1852-55 | |
| | Years | Name | Political Party |
| 1855-58; 1859-65 | |
| 1868; 1874-80 | |
| 1868-74; 1880-85; 1886; 1892-94 | |
| 1885-86; 1886-92; 1895-1902 | |
| 1894-95 | |
| 1902-5 | |
| 1905-8 | |
| 1908-15 | |
| 1916-22 | |
| 1922-23 | |
| 1923-24; 1924-29; 1935-37 | |
| 1924; 1929-31; 1931-35 | |
| 1937-40 | |
| 1940-45; 1951-55 | |
| 1945-51 | |
| 1955-57 | |
| 1957-63 | |
| 1963-64 | |
| 1964-70; 1974-76 | |
| 1970-74 | |
| 1976-79 | |
| 1979-90 | |
| 1990-97 | |
| 1997-2007 | |
| 2007-2010 | |
| 2010- Present | |
|