Hardly changed over the seasons, as the Sicilian Defence is firmly rooted at the top, and the remaining openings played seem to remain more-or-less static, just varying in popularity, although General Queen's Pawn Openings ( ie not specific Queen's Gambits or English or often not with an automatic c4 ) seem to be on the increase at the moment.
Counted in this ( General Queen's Pawn) are 'systems' such as the London or Colle, which I would think are often used by amateurs to cut down on amount of theory required: certainly that applies to me, as I have adopted the London recently.
Other openings remaining most played are the Caro-Kann and French, from a Black point of view, and the English and Spanish from White's perspective.
However, if you consider the most played move, then, technically, 1.e4 is the most used opening move with the reply of e5 just beating c5 followed by e6, c6, d6, d5.