Upper Chamber Countries and Elections
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| Countries | Number of Elections | Years |
|---|---|---|
| Argentina | 13 | 2001, 2003, 2005, 2007, 2009, 2011, 2013, 2015, 2017, 2019, 2021, 2023, 2025 |
| Australia | 18 | 1977, 1980, 1983, 1984, 1987, 1990, 1993, 1996, 1998, 2001, 2004, 2007, 2010, 2013, 2016, 2019, 2022, 2025 |
| Belgium | 21 | 1946, 1949, 1950, 1954, 1958, 1961, 1965, 1968, 1971, 1974, 1977, 1978, 1981, 1985, 1987, 1991, 1995, 1999, 2003, 2007, 2010 |
| Bhutan | 4 | 2007/2008, 2013, 2018, 2023 |
| Bolivia | 11 | 1979, 1980, 1985, 1989, 1993, 1997, 2002, 2005, 2009, 2014, 2019 |
| Brazil | 7 | 1998, 2002, 2006, 2010, 2014, 2018, 2022 |
| Chile | 8 | 1989, 1993, 1997, 2001, 2005, 2009, 2013, 2025 |
| Colombia | 3 | 2014, 2018, 2022 |
| Czechia | 15 | 1996, 1998, 2000, 2002, 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2020, 2022, 2024, 2025 |
| Dominican Republic | 6 | 2002, 2006, 2010, 2016, 2020, 2024 |
| Haiti | 2 | 2015, 2016 |
| Italy | 19 | 1948, 1953, 1958, 1963, 1968, 1972, 1976, 1979, 1983, 1987, 1992, 1994, 1996, 2001, 2006, 2008, 2013, 2018, 2022 |
| Japan | 2 | 2013, 2019 |
| Liberia | 5 | 2005, 2011, 2014, 2020, 2023 |
| Mexico | 8 | 1991, 1994, 1997, 2000, 2006, 2012, 2018, 2024 |
| Myanmar | 3 | 2010, 2015, 2020 |
| Nigeria | 3 | 2011, 2015, 2019 |
| Northern Mariana Islands | 2 | 2016, 2022 |
| Palau | 5 | 2008, 2012, 2016, 2020, 2024 |
| Paraguay | 5 | 1998, 2003, 2008, 2013, 2018 |
| Philippines | 1 | 2019 |
| Poland | 8 | 1997, 2001, 2005, 2007, 2011, 2015, 2019, 2023 |
| Puerto Rico | 3 | 2016, 2020, 2024 |
| Romania | 7 | 1992, 1996, 2000, 2004, 2008, 2012, 2016 |
| Spain | 15 | 1977, 1979, 1982, 1986, 1989, 1993, 1996, 2000, 2004, 2008, 2011, 2015, 2016, 2019, 2023 |
| Switzerland | 6 | 2003, 2007, 2011, 2015, 2019, 2023 |
| Thailand | 2 | 2008, 2014 |
| Uruguay | 1 | 2019 |
| United States | 60 | 1906, 1907, 1908, 1910, 1911, 1912, 1914, 1916, 1920, 1922, 1924, 1926, 1928, 1930, 1932, 1934, 1936, 1938, 1940, 1942, 1944, 1946, 1948, 1950, 1952, 1954, 1956, 1958/1959, 1960, 1962, 1964, 1966, 1968, 1970, 1972, 1974, 1976, 1978, 1980, 1982, 1984, 1986, 1988, 1990, 1992, 1994, 1996, 1998, 2000, 2002, 2004, 2006, 2008, 2010, 2012, 2014, 2016, 2018, 2020, 2022, 2024 |
| Zimbabwe | 3 | 2005, 2008, 2013 |