Before I started adding comments on this site, I also thought that the use of modelyear was a matter of course. But it isn´t as evident to all as it is to americans or swedes. Looking at the comments about years for the cars here, a large percentage of the non american cars gets comments that are one year ahead of the possible modelyear. I guess there are several reasons for that, nevertheless it´s a fact that we have different ways of looking at it.

So, just adding one more field to the years wouldn´t help much. It´s necessary to have the range of production years by themselves, first production year almost always correspond the year of introduction. And keep the current yearfield separate, but rename it to Modelyear so it´s no doubt what´s what.

This way an exact modelyear can be defined, if possible, within the range. And for those who prefer year of introduction it´ll be there too.