The method of 50/50 mixed elections was used in the 2002 and 2012 elections; however, in 2006 and 2007, the elections were held under a proportional system only.
Metode pemilihan campuran 50/50 digunakan dalam pemilu 2002 dan 2012; akan tetapi, pada tahun 2006 dan 2007, pemilu diadakan di bawah sistem proporsional saja.