After the withdrawal of Linfield from the 2014 competition, Glentoran became the only club to have entered all nine competitions since its inception. A total of 21 different clubs appeared in the competition - 9 different clubs from Northern Ireland and 12 different clubs from the Republic of Ireland. Of those 21 clubs, twelve different clubs reached the final but only seven of them went on to win the cup, and only two clubs won the cup more than once. In the nine competitions, seven of them were won by a club from the Republic of Ireland, with only two winners being from Northern Ireland. On four occasions, the cup was won by a club making their first appearance in the competition. Linfield won the cup in their first appearance - the inaugural 2005 competition. This feat was repeated by Drogheda United during their first appearance in 2006, and in 2007 they became the only club to successfully retain the cup, and the first of two clubs to win the cup more than once. The feat was also repeated by Bohemians during their first appearance in 2009–10, and by Shamrock Rovers, when they won the cup during their first appearance in 2011. In 2013, they went on to become the second club to win the cup more than once.