Add to the list: 1957, 1959, 1963, 1971, 1973, 1976, 1980 and 1990 - where heavily manipulated/irregular elections or outright coups occurred and the masses took to the streets in protests against the usual circles. Some end results were nastier and more tragic than others.
Some observers might suggest that such back-n-forth and unstable activities are a way of life here.
They will not surrender their places of elitist dominion, as history will show......and as is currently presenting itself.