| Jahr | Gewählte | Kandidaturen |
|---|---|---|
| 1968 | 0.108 | 0.201219512195122 |
| 1972 | 0.162 | 0.193790149892934 |
| 1976 | 0.169 | 0.239130434782609 |
| 1980 | 0.162 | 0.26051282051282 |
| 1984 | 0.246 | 0.295008912655971 |
| 1988 | 0.269 | 0.347045624532536 |
| 1992 | 0.292 | 0.343543046357616 |
| 1996 | 0.308 | 0.389371980676329 |
| 2000 | 0.346 | 0.365330848089469 |
| 2004 | 0.362 | 0.361963190184049 |
| 2008 | 0.37 | 0.346987951807229 |
| 2012 | 0.31 | 0.340702210663199 |
| 2016 | 0.31 | 0.351245085190039 |
| 2020 | 0.42 | 0.356060606 |
| 2024 | 0.46 | 0.382759 |