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Bukit Panjang and Mountbatten currently share the roots where it has been interrupted due to Group Representation Constituency system, where it had been merged into the respective bigger constituencies at different times. No other constituencies has survived longer without the interruption after Chua Chu Kang had been merged into Chua Chu Kang GRC.
After the HDB flats demolished in Joo Chiat constituency, the constituency was merged into Marine Parade GRC in 2015.
Note : Elections Department Singapore do not include rejected votes for calculation of candidate's vote share. Hence, the total of all candidates' vote share will be 100%.