what is the total number of competition?
20
col : date | competition | location | country | event | placing | rider | nationality row 1 : 31 october 2008 | 2008–09 world cup | manchester | united kingdom | sprint | 1 | victoria pendleton | gbr row 2 : 31 october 2008 | 2008–09 world cup | manchester | united kingdom | keirin | 2 | jason kenny | gbr row 3 : 1 november 2008 | 2008–09 world cup | manchester | united kingdom | sprint | 1 | jason kenny | gbr row 4 : 1 november 2008 | 2008–09 world cup | manchester | united kingdom | 500 m time trial | 1 | victoria pendleton | gbr row 5 : 2 november 2008 | 2008–09 world cup | manchester | united kingdom | team sprint | 1 | ross edgar | gbr row 6 : 2 november 2008 | 2008–09 world cup | manchester | united kingdom | team sprint | 1 | jason kenny | gbr row 7 : 2 november 2008 | 2008–09 world cup | manchester | united kingdom | team sprint | 1 | jamie staff | gbr row 8 : 2 november 2008 | 2008–09 world cup | manchester | united kingdom | keirin | 1 | victoria pendleton | gbr row 9 : 2 november 2008 | 5th international keirin event | manchester | united kingdom | international keirin | 2 | ross edgar | gbr row 10 : 13 february 2009 | 2008–09 world cup | copenhagen | denmark | team sprint | 1 | chris hoy | gbr row 11 : 13 february 2009 | 2008–09 world cup | copenhagen | denmark | team sprint | 1 | jason kenny | gbr row 12 : 13 february 2009 | 2008–09 world cup | copenhagen | denmark | team sprint | 1 | jamie staff | gbr row 13 : 13 february 2009 | 2008–09 world cup | copenhagen | denmark | sprint | 1 | victoria pendleton | gbr row 14 : 30 october 2009 | 2009–10 world cup | manchester | united kingdom | keirin | 1 | chris hoy | gbr row 15 : 30 october 2009 | 2009–10 world cup | manchester | united kingdom | sprint | 1 | victoria pendleton | gbr row 16 : 30 october 2009 | 2009–10 world cup | manchester | united kingdom | sprint | 1 | chris hoy | gbr row 17 : 30 october 2009 | 2009–10 world cup | manchester | united kingdom | 500 m time trial | 2 | victoria pendleton | gbr row 18 : 1 november 2009 | 2009–10 world cup | manchester | united kingdom | team sprint | 1 | ross edgar | gbr row 19 : 1 november 2009 | 2009–10 world cup | manchester | united kingdom | team sprint | 1 | chris hoy | gbr row 20 : 1 november 2009 | 2009–10 world cup | manchester | united kingdom | team sprint | 1 | jamie staff | gbr
what is the total number of competition?
Date Competition Location Country Event Placing Rider Nationality
31 October 2008 2008–09 World Cup Manchester United Kingdom Sprint 1 Victoria Pendleton GBR
31 October 2008 2008–09 World Cup Manchester United Kingdom Keirin 2 Jason Kenny GBR
1 November 2008 2008–09 World Cup Manchester United Kingdom Sprint 1 Jason Kenny GBR
1 November 2008 2008–09 World Cup Manchester United Kingdom 500 m time trial 1 Victoria Pendleton GBR
2 November 2008 2008–09 World Cup Manchester United Kingdom Team sprint 1 Ross Edgar GBR
2 November 2008 2008–09 World Cup Manchester United Kingdom Team sprint 1 Jason Kenny GBR
2 November 2008 2008–09 World Cup Manchester United Kingdom Team sprint 1 Jamie Staff GBR
2 November 2008 2008–09 World Cup Manchester United Kingdom Keirin 1 Victoria Pendleton GBR
2 November 2008 5th International Keirin Event Manchester United Kingdom International keirin 2 Ross Edgar GBR
13 February 2009 2008–09 World Cup Copenhagen Denmark Team sprint 1 Chris Hoy GBR
13 February 2009 2008–09 World Cup Copenhagen Denmark Team sprint 1 Jason Kenny GBR
13 February 2009 2008–09 World Cup Copenhagen Denmark Team sprint 1 Jamie Staff GBR
13 February 2009 2008–09 World Cup Copenhagen Denmark Sprint 1 Victoria Pendleton GBR
30 October 2009 2009–10 World Cup Manchester United Kingdom Keirin 1 Chris Hoy GBR
30 October 2009 2009–10 World Cup Manchester United Kingdom Sprint 1 Victoria Pendleton GBR
30 October 2009 2009–10 World Cup Manchester United Kingdom Sprint 1 Chris Hoy GBR
30 October 2009 2009–10 World Cup Manchester United Kingdom 500 m time trial 2 Victoria Pendleton GBR
1 November 2009 2009–10 World Cup Manchester United Kingdom Team sprint 1 Ross Edgar GBR
1 November 2009 2009–10 World Cup Manchester United Kingdom Team sprint 1 Chris Hoy GBR
1 November 2009 2009–10 World Cup Manchester United Kingdom Team sprint 1 Jamie Staff GBR
20