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:
| Season | Date | Winning Driver | Car # | Sponsor | Make | Team | Avg Speed | Margin of Victory |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1993.0 | July 11 | Rusty Wallace | 2.0 | Miller Genuine Draft | Pontiac Grand Prix | Penske Racing | mph (km/h) | 1.31 sec |
| 1994.0 | July 10 | Ricky Rudd | 10.0 | Tide | Ford Thunderbird | Rudd Performance Motorsports | mph (km/h) | 0.69 sec |
| 1995.0 | July 9 | Jeff Gordon | 24.0 | DuPont | Chevrolet Monte Carlo | Hendrick Motorsports | mph (km/h) | 1.23 sec |
| 1996.0 | July 14 | Ernie Irvan | 28.0 | Texaco Havoline | Ford Thunderbird | Robert Yates Racing | mph (km/h) | 5.47 sec |
| 1997.0 | July 13 | Jeff Burton | 99.0 | Exide Batteries | Ford Thunderbird | Roush Racing | mph (km/h) | 5.372 sec |
| 1997.0 | September 14 | Jeff Gordon | 24.0 | DuPont | Chevrolet Monte Carlo | Hendrick Motorsports | mph (km/h) | 0.209 sec |
| 1998.0 | July 13 | Jeff Burton | 99.0 | Exide Batteries | Ford Taurus | Roush Racing | mph (km/h) | 7.439 sec |
| 1998.0 | August 30 | Jeff Gordon | 24.0 | DuPont | Chevrolet Monte Carlo | Hendrick Motorsports | mph (km/h) | 0.664 sec |
| 1999.0 | July 11 | Jeff Burton | 99.0 | Exide Batteries | Ford Taurus | Roush Racing | mph (km/h) | 1.347 sec |
| 1999.0 | September 19 | Joe Nemechek | 42.0 | BellSouth | Chevrolet Monte Carlo | Team SABCO | mph (km/h) | UC |
| 2000.0 | July 9 | Tony Stewart | 20.0 | Home Depot | Pontiac Grand Prix | Joe Gibbs Racing | mph (km/h) | UC/Rain |
| 2000.0 | September 17 | Jeff Burton | 99.0 | Exide Batteries | Ford Taurus | Roush Racing | mph (km/h) | UC |
| 2001.0 | July 22 | Dale Jarrett | 88.0 | UPS | Ford Taurus | Robert Yates Racing | mph (km/h) | 0.656 sec |
| 2001.0 | November 23 | Robby Gordon | 31.0 | Lowe's | Chevrolet Monte Carlo | Richard Childress Racing | mph (km/h) | 2.008 sec |
| 2002.0 | July 21 | Ward Burton | 22.0 | Caterpillar | Dodge Intrepid | Bill Davis Racing | mph (km/h) | 0.656 sec |
| 2002.0 | September 15 | Ryan Newman | 12.0 | Mobil 1 / Alltel | Ford Taurus | Penske Racing | mph (km/h) | UC/Rain |
| 2003.0 | July 20 | Jimmie Johnson | 48.0 | Lowe's | Chevrolet Monte Carlo | Hendrick Motorsports | mph (km/h) | 1.582 sec |
| 2003.0 | September 14 | Jimmie Johnson | 48.0 | Lowe's | Chevrolet Monte Carlo | Hendrick Motorsports | mph (km/h) | 6.240 sec |
| 2004.0 | July 25 | Kurt Busch | 97.0 | Irwin Industrial Tools | Ford Taurus | Roush Racing | mph (km/h) | 0.607 sec |
| 2004.0 | September 19 | Kurt Busch | 97.0 | Irwin Industrial Tools | Ford Taurus | Roush Racing | mph (km/h) | 2.488 sec |
| 2005.0 | July 17 | Tony Stewart | 20.0 | Home Depot | Chevrolet Monte Carlo | Joe Gibbs Racing | mph (km/h) | 0.851 sec |
| 2005.0 | September 18 | Ryan Newman | 12.0 | Mobil 1 / Alltel | Dodge Charger | Penske Racing | mph (km/h) | 0.292 sec |
| 2006.0 | July 16 | Kyle Busch | 5.0 | Kellogg's | Chevrolet Monte Carlo | Hendrick Motorsports | mph (km/h) | 0.406 sec |
| 2006.0 | September 17 | Kevin Harvick | 29.0 | Reese's | Chevrolet Monte Carlo | Richard Childress Racing | mph (km/h) | 0.777 sec |
| 2007.0 | July 1 | Denny Hamlin | 11.0 | FedEx Ground | Chevrolet Impala SS | Joe Gibbs Racing | mph (km/h) | 0.068 sec |
| 2007.0 | September 16 | Clint Bowyer | 7.0 | Jack Daniel's | Chevrolet Impala SS | Richard Childress Racing | mph (km/h) | 6.469 sec |
| 2008.0 | June 29 | Kurt Busch | 2.0 | Miller Lite | Dodge Charger | Penske Racing | mph (km/h) | UC/Called due to rain |
| 2008.0 | September 14 | Greg Biffle | 16.0 | Dish Network Turbo HD | Ford Fusion | Roush Fenway Racing | mph (km/h) | 0.505 sec |
| 2009.0 | June 28 | Joey Logano | 20.0 | Home Depot | Toyota Camry | Joe Gibbs Racing | mph (km/h) | UC/Called due to rain |
| 2009.0 | September 20 | Mark Martin | 5.0 | Carquest / Kellogg's | Chevrolet Impala SS | Hendrick Motorsports | mph (km/h) | UC |
| 2010.0 | June 27 | Jimmie Johnson | 48.0 | Lowe's | Chevrolet Impala | Hendrick Motorsports | mph (km/h) | 0.753 sec |
| 2010.0 | September 19 | Clint Bowyer | 33.0 | Cheerios / Hamburger Helper | Chevrolet Impala | Richard Childress Racing | mph (km/h) | 0.477 sec |
| 2011.0 | July 17 | Ryan Newman | 39.0 | U.S. Army | Chevrolet Impala | Stewart-Haas Racing | mph (km/h) | 0.773 sec |
| 2011.0 | September 25 | Tony Stewart | 14.0 | Mobil 1 / Office Depot | Chevrolet Impala | Stewart-Haas Racing | mph (km/h) | 7.225 sec |
| 2012.0 | July 15 | Kasey Kahne | 5.0 | Farmers Insurance | Chevrolet Impala | Hendrick Motorsports | mph (km/h) | 2.738 sec |
| 2012.0 | September 23 | Denny Hamlin | 11.0 | FedEx Freight | Toyota Camry | Joe Gibbs Racing | mph (km/h) | 2.675 sec |
| 2013.0 | July 14 | Brian Vickers | 55.0 | Aaron's | Toyota Camry | Michael Waltrip Racing | mph (km/h) | .582 sec |
| 2013.0 | September 22 | Matt Kenseth | 20.0 | Husky Tools | Toyota Camry | Joe Gibbs Racing | mph (km/h) | .533 sec |
Question:
What was the average speed of Tony Stewart's winning Chevrolet Impala?
Answer:
mph (km/h)