Observations from the desk of the old man, who lives in a big city:

Kilted since a wee lad. But only for weddings, funerals, church. Back then.
The only kilts being the traditional bespoke wool tartan type.

Kilts seen on pipe bands in parades. Still happens today.

Kilted men in travel adverts in the newspaper for Scotland.

Kilted men on telly adverts for Scotland did not start until the invention of colour videography.
Shortly thereafter the parades with pipe bands were to be seen on the telly.

Around 1985 self colour kilt like garments started to be seen on men of the artistic nature. Tartan kilts being seen on the street on rare occasion.

1995 or so the cargo utility skirt like thing started making itself seen. Pleats of a sort in the rear, but no overlapping aprons in the front. Like a skirt you had to step into it and fasten the button at the waist and zip up the front.

Around 2000 the utility kilt started coming into noticeable use. Large pleats in the rear, overlapping aprons in the front (narrower than on the tartan kilt) fastened with buttons, hooks, or snaps. Not shaped well and held to the waist by a belt.

2003 the kilt is seen on the street. Not just the traditional wool, but tartans in many different fabrics machine sewn to resemble the knife pleated kilt.

2006 men wearing kilts / kilt like garments becoming more commonplace.

Slainte