Table:
text: S.Oliver Baskets
Season by season
Season by season
Season Tier League Pos_ Postseason European_competitions
2007–08 4 RegionalLiga 3 – –
2008–09 4 RegionalLiga 1 Promoted –
2009–10 3 ProB 3 Promoted –
2010–11 2 ProA 2 Promoted –
2011–12 1 Bundesliga 4 Semifinalist –
2012–13 1 Bundesliga 9 – Eurocup Regular Season

Question: From the S.Oliver Baskets list, what is the total number of tiers for the semifinalist's postseason?