apportionment in the Hellenic Parliament
... that, on average, Greece has changed its electoral law regarding apportionment in the Hellenic Parliament once every 1.5 elections?
... that, on average, Greece has changed its electoral law regarding <b id="mwIg"><a href="./Apportionment_in_the_Hellenic_Parliament" id="mwIw" rel="mw:WikiLink" title="Apportionment in the Hellenic Parliament">apportionment in the Hellenic Parliament</a></b> once every 1.5 elections?