which racing series has the highest total of winners?
nascar
col : year | driver | nation of citizenship | racing series | type of vehicle row 1 : 1993 | nigel mansell | united kingdom | formula one | open wheel row 2 : 1994 | nigel mansell | united kingdom | cart | open wheel row 3 : 1995 | al unser, jr. | united states | cart | open wheel row 4 : 1996 | jeff gordon | united states | nascar | stock car row 5 : 1997 | jimmy vasser | united states | cart | open wheel row 6 : 1998 | jeff gordon | united states | nascar | stock car row 7 : 1999 | jeff gordon | united states | nascar | stock car row 8 : 2000 | dale jarrett | united states | nascar | stock car row 9 : 2001 | bobby labonte | united states | nascar | stock car row 10 : 2002 | michael schumacher | germany | formula one | open wheel row 11 : 2003 | tony stewart | united states | nascar | stock car row 12 : 2004 | dale earnhardt, jr. | united states | nascar | stock car row 13 : 2005 | michael schumacher | germany | formula one | open wheel row 14 : 2006 | tony stewart | united states | nascar | stock car row 15 : 2007 | jeff gordon | united states | nascar | stock car row 16 : 2008 | jimmie johnson | united states | nascar | stock car row 17 : 2009 | jimmie johnson | united states | nascar | stock car row 18 : 2010 | jimmie johnson | united states | nascar | stock car row 19 : 2011 | jimmie johnson | united states | nascar | stock car row 20 : 2012 | tony stewart | united states | nascar | stock car row 21 : 2013 | ryan hunter-reay | united states | indycar series | open wheel
which racing series has the highest total of winners?
Year Driver Nation of citizenship Racing series Type of vehicle
1993 Nigel Mansell United Kingdom Formula One Open wheel
1994 Nigel Mansell United Kingdom CART Open wheel
1995 Al Unser, Jr. United States CART Open wheel
1996 Jeff Gordon United States NASCAR Stock car
1997 Jimmy Vasser United States CART Open wheel
1998 Jeff Gordon United States NASCAR Stock car
1999 Jeff Gordon United States NASCAR Stock car
2000 Dale Jarrett United States NASCAR Stock car
2001 Bobby Labonte United States NASCAR Stock car
2002 Michael Schumacher Germany Formula One Open wheel
2003 Tony Stewart United States NASCAR Stock car
2004 Dale Earnhardt, Jr. United States NASCAR Stock car
2005 Michael Schumacher Germany Formula One Open wheel
2006 Tony Stewart United States NASCAR Stock car
2007 Jeff Gordon United States NASCAR Stock car
2008 Jimmie Johnson United States NASCAR Stock car
2009 Jimmie Johnson United States NASCAR Stock car
2010 Jimmie Johnson United States NASCAR Stock car
2011 Jimmie Johnson United States NASCAR Stock car
2012 Tony Stewart United States NASCAR Stock car
2013 Ryan Hunter-Reay United States IndyCar Series Open wheel
NASCAR