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:
| Year | Stage | Start | Finish | Leader at the summit |
| --- | --- | --- | --- | --- |
| 2012.0 | 17.0 | Bagnères-de-Luchon | Peyragudes | Thomas Voeckler ( FRA ) |
| 2010.0 | 15.0 | Pamiers | Bagnères-de-Luchon | Thomas Voeckler ( FRA ) |
| 2008.0 | 9.0 | Toulouse | Bagnères-de-Bigorre | Sebastian Lang ( DEU ) |
| 2006.0 | 12.0 | Bagnères de Luchon | Carcassonne | Michael Rasmussen ( DEN ) |
| 2004.0 | 13.0 | Lannemezan | Plateau de Beille | Sylvain Chavanel ( FRA ) |
| 1999.0 | 15.0 | Saint-Gaudens | Piau-Engaly | Mariano Piccoli ( ITA ) |
| 1997.0 | 10.0 | Bagnères de Luchon | Andorra | Laurent Brochard ( FRA ) |
| 1989.0 | 11.0 | Bagnères de Luchon | Blagnac | Gert-Jan Theunisse ( NED ) |
| 1984.0 | 11.0 | Pau | Guzet-Neige | Théo De Rooy ( NED ) |
| 1981.0 | 6.0 | Saint-Gaudens | Saint-Lary Soulan (Pla d'Adet) | Bernard Becaas ( FRA ) |
| 1972.0 | 9.0 | Bagnères de Luchon | Colomiers | Christian Raymond ( FRA ) |
| 1968.0 | 14.0 | la Seu d'Urgell | Canet-Plage | Franco Bitossi ( ITA ) |
| 1966.0 | 11.0 | Pau | Bagnères de Luchon | Joaquim Galera ( ESP ) |
| 1964.0 | 15.0 | Toulouse | Bagnères de Luchon | Joaquim Galera ( ESP ) |
| 1963.0 | 12.0 | Bagnères de Luchon | Toulouse | Rik Van Looy ( BEL ) |
| 1962.0 | 14.0 | Bagnères de Luchon | Carcassonne | André Darrigade ( FRA ) |
| 1961.0 | 16.0 | Toulouse | Superbagnères | Imerio Massignan ( ITA ) |
| 1960.0 | 12.0 | Bagnères de Luchon | Toulouse | André Darrigade ( FRA ) |
| 1957.0 | 17.0 | Ax-les-Thermes | Saint-Gaudens | Group |
| 1956.0 | 13.0 | Bagnères de Luchon | Toulouse | Bruno Monti ( ITA ) |
| 1952.0 | 17.0 | Toulouse | Bagnères-de-Bigorre | Group |
| 1951.0 | 15.0 | Bagnères de Luchon | Carcassonne | José Serra ( ESP ) |
| 1948.0 | 8.0 | Lourdes | Toulouse | Jean Robic ( FRA ) |
| 1947.0 | 14.0 | Carcassonne | Bagnères de Luchon | Albert Bourlon ( FRA ) |
Question:
What is the highest stage number for a year later than 1948, leader at the summit was group, and finish was Bagnères-De-Bigorre?
Answer:
17.0