what is the total number of jockeys listed here?
13
col : finished | post | horse | jockey | trainer | owner | time / behind row 1 : 1st | 6 | silver charm | gary l. stevens | bob baffert | bob & beverly lewis | 2:02.44 row 2 : 2nd | 5 | captain bodgit | alex solis | gary a. capuano | team valor |  row 3 : 3rd | 12 | free house | david flores | j. paco gonzalez | john toffan & trudy mccaffery |  row 4 : 4th | 3 | pulpit | shane sellers | frank l. brothers | claiborne farm |  row 5 : 5th | 10 | crypto star | pat day | wayne m. catalano | evelyn & darrell yates |  row 6 : 6th | 9 | phantom on tour | jerry d. bailey | lynn s. whiting | w. cal partee |  row 7 : 7th | 5 | jack flash | craig perret | nick zito | dogwood stable |  row 8 : 8th | 6 | hello | mike smith | ronald mcanally | sandee & al kirkwood |  row 9 : 9th | 1 | concerto | carlos h. marquez, jr. | john j. tammaro, iii | kinsman stable |  row 10 : 10th | 13 | celtic warrior | francisco torres | danny hutt | hutt, quackenbush & shaffrick |  row 11 : 11th | 4 | crimson classic | robby albarado | forrest kaelin | john w. clay |  row 12 : 12th | 15 | shammy davis | willie martinez | nick zito | fox hill farm |  row 13 : 13th | 11 | deeds not words | corey nakatani | d. wayne lukas | michael tabor & susan magnier |
what is the total number of jockeys listed here?
Finished Post Horse Jockey Trainer Owner Time / behind
1st 6 Silver Charm Gary L. Stevens Bob Baffert Bob & Beverly Lewis 2:02.44
2nd 5 Captain Bodgit Alex Solis Gary A. Capuano Team Valor
3rd 12 Free House David Flores J. Paco Gonzalez John Toffan & Trudy McCaffery
4th 3 Pulpit Shane Sellers Frank L. Brothers Claiborne Farm
5th 10 Crypto Star Pat Day Wayne M. Catalano Evelyn & Darrell Yates
6th 9 Phantom on Tour Jerry D. Bailey Lynn S. Whiting W. Cal Partee
7th 5 Jack Flash Craig Perret Nick Zito Dogwood Stable
8th 6 Hello Mike Smith Ronald McAnally Sandee & Al Kirkwood
9th 1 Concerto Carlos H. Marquez, Jr. John J. Tammaro, III Kinsman Stable
10th 13 Celtic Warrior Francisco Torres Danny Hutt Hutt, Quackenbush & Shaffrick
11th 4 Crimson Classic Robby Albarado Forrest Kaelin John W. Clay
12th 15 Shammy Davis Willie Martinez Nick Zito Fox Hill Farm
13th 11 Deeds Not Words Corey Nakatani D. Wayne Lukas Michael Tabor & Susan Magnier
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