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:
| Number | Time | Aircraft | Opponent | Location |
| --- | --- | --- | --- | --- |
| 1.0 | 1810.0 | Nieuport | Pfalz D.III | Baussant |
| 2.0 | 805.0 | Nieuport | Pfalz D.III | Pont-à-Mousson |
| 3.0 | 1824.0 | Nieuport | Albatros D.V | Ribécourt |
| 4.0 | 912.0 | Nieuport | Albatros D.V | Flirey |
| 5.0 | 925.0 | Nieuport | Albatros C.I | Bois de Rate |
| 6.0 | 738.0 | Nieuport | Albatros C.I | Jaulny |
| 7.0 | 815.0 | SPAD XIII | Fokker D.VII | Villecy |
| 8.0 | 810.0 | SPAD XIII | Fokker D.VII | Bois de Warville |
| 9.0 | 840.0 | SPAD XIII | Fokker D.VII | Billy |
| 10.0 | 850.0 | SPAD XIII | Halberstadt C | Foret de Spincourt |
| 11.0 | 600.0 | SPAD XIII | Fokker D.VII | Damvillers |
| 12.0 | 500.0 | SPAD XIII | Balloon | Sivry-sur-Meuse |
| 13.0 | 1930.0 | SPAD XIII | Balloon | Puzieux |
| 14.0 | 1730.0 | SPAD XIII | Hannover CL | Montfaucon |
| 15.0 | 1740.0 | SPAD XIII | Fokker D.VII | Vilosnes |
| 16.0 | 1707.0 | SPAD XIII | Balloon | Dannevoux |
| 17.0 | 1640.0 | SPAD XIII | Fokker D.VII | Cléry-le-Grand |
| 18.0 | 1752.0 | SPAD XIII | Fokker D.VII | Dun-sur-Meuse |
| 19.0 | 1552.0 | SPAD XIII | Fokker D.VII | Cléry-le-Petit |
| 20.0 | 1552.0 | SPAD XIII | Fokker D.VII | Cléry-le-Petit |
| 21.0 | 1555.0 | SPAD XIII | Fokker D.VII | Cléry-le-Petit |
| 22.0 | 1655.0 | SPAD XIII | Fokker D.VII | Grande Carne Ferme |
| 23.0 | 1505.0 | SPAD XIII | Fokker D.VII | Bois de Money |
| 24.0 | 1450.0 | SPAD XIII | Fokker D.VII | Grand Pre |
| 25.0 | 1635.0 | SPAD XIII | Balloon | St. Juvin |
| 26.0 | 1040.0 | SPAD XIII | Balloon | Remonville |
Question:
What is number 21's highest time?
Answer:
1555.0