I'm asking here as well:

When was the first time a WRC stage had a donut marked in the road book?

So far I've found these:

2014 Catalunya SS1 Barcelona - first fully artificial donut
2012 Catalunya SS13 Riudecanyes - first roundabout donut on a non-super-special stage (4 km from the start)
2011 Mexico SS1 Guanajuato Street Stage - first roundabout donut on an SSS

Any earlier examples? Many people bring up Panizzi in Catalunya 2002 but it was not marked in the route. The Portugal Estoril donuts way back in the 80's and 70's meanwhile were just a show event outside competition after the rally had ended.