By 1976, the league had expanded to its current 28 teams.

The league expanded from 10 to 16 teams in its second season.

This season, the league has expanded from 10 to 12 teams.

The league soon expanded and quickly spread across the country.

The league expanded from 16 to 17 teams in its third season.

The league expanded to five teams in 1991 and to six last year.

In 2011 the league expanded from 16 to 18 teams.

In recent years however, the league has expanded a little.

Since 1967, the league has expanded to four times its former size.

In 2012, the league expanded from 4 to 9 teams.