Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Team | Stadium | Capacity | Opened | City |
| --- | --- | --- | --- | --- |
| Amsterdam Admirals | Amsterdam ArenA | 51859.0 | 1996.0 | Amsterdam , The Netherlands |
| Amsterdam Admirals | Olympisch Stadion | 31600.0 | 1928.0 | Amsterdam , The Netherlands |
| Barcelona Dragons | Mini Estadi | 15276.0 | 1982.0 | Barcelona , Spain |
| Barcelona Dragons | Estadi Olímpic Lluís Companys | 56000.0 | 1929.0 | Barcelona , Spain |
| Berlin Thunder | Olympiastadion | 76000.0 | 1936.0 | Berlin , Germany |
| Berlin Thunder | F. L. Jahn Sportpark | 19500.0 | 1951.0 | Berlin , Germany |
| Cologne Centurions | RheinEnergieStadion | 50374.0 | 1923.0 | Cologne , Germany |
| Frankfurt Galaxy | Commerzbank-Arena Waldstadion (1925–2005) | 52000.0 | 1925.0 | Frankfurt , Germany |
| Hamburg Sea Devils | AOL Arena | 55989.0 | 2000.0 | Hamburg , Germany |
| London/England Monarchs | Ashton Gate | 21500.0 | 1900.0 | Bristol , England |
| London/England Monarchs | Alexander Stadium | 7600.0 | 1976.0 | Birmingham , England |
| London/England Monarchs | Crystal Palace National Sports Centre | 15500.0 | 1964.0 | London , England |
| London/England Monarchs | Stamford Bridge | 42449.0 | 1877.0 | London , England |
| London/England Monarchs | White Hart Lane | 36240.0 | 1899.0 | London , England |
| London/England Monarchs | Wembley Stadium | 80000.0 | 1923.0 | London , England |
| Rhein Fire | LTU Arena | 51500.0 | 2004.0 | Düsseldorf , Germany |
| Rhein Fire | Arena AufSchalke | 61524.0 | 2001.0 | Gelsenkirchen , Germany |
| Rhein Fire | Rheinstadion | 55900.0 | 1926.0 | Düsseldorf , Germany |
| Scottish Claymores | Hampden Park | 52500.0 | 1903.0 | Glasgow , Scotland |
| Scottish Claymores | Murrayfield Stadium | 67500.0 | 1925.0 | Edinburgh , Scotland |
Question:
What is the average opened year of Mini Estadi stadium in Barcelona, Spain?
Answer:
1982.0