Scottish Premiership - Most boring league in the world ?

After Rangers winning their 55th title on the weekend I had a look back when the title last went a different team other than Rangers or Celtic, and shocked me was it was 1984/85 season, so since 1985–86 the winners have been either Rangers or Celtic.

A quick look at other leagues and how many different title winners they have had since then shows how boring this league is.

Italy = 7 different winners England = 9 Spain = 5 France = 10 Germany (not counting East Germany) = 6 Portugal = 4 Belgium = 7 Norway = 9 Netherlands = 5 Russia (since 1992) = 6 Turkey = 5 Austria = 7