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:
| Year | Date | Driver | Team | Manufacturer | Laps | Miles (km) | Race Time | Average Speed (mph) | Report |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1961 | July 30 | Jack Smith * Johnny Allen * | Jack Smith | Pontiac | 500 | 250 (402.336) | 3:39:23 | 68.373 | Report |
| 1962 | April 29 | Bobby Johns | Shorty Johns | Pontiac | 500 | 250 (402.336) | 3:24:22 | 73.397 | Report |
| 1963 | July 28 | Fred Lorenzen * Ned Jarrett * | Holman-Moody | Ford | 500 | 250 (402.336) | 3:20:25 | 74.844 | Report |
| 1964 | July 26 | Fred Lorenzen | Holman-Moody | Ford | 500 | 250 (402.336) | 3:12:12 | 78.044 | Report |
| 1965 | July 25 | Ned Jarrett | Bondy Long | Ford | 500 | 250 (402.336) | 4:02:37 | 61.826 | Report |
| 1966 | July 24 | Paul Goldsmith | Ray Nichels | Plymouth | 500 | 250 (402.336) | 3:12:24 | 77.963 | Report |
| 1967 | July 23 | Richard Petty | Petty Enterprises | Plymouth | 500 | 250 (402.336) | 3:10:35 | 78.705 | Report |
| 1968 | July 21 | David Pearson | Holman-Moody | Ford | 500 | 250 (402.336) | 3:16:34 | 76.31 | Report |
| 1969 | July 20 | David Pearson | Holman-Moody | Ford | 500 | 266.5 (428.89) | 3:08:07 | 79.737 | Report |
| 1970 | July 19 | Bobby Allison | Bobby Allison | Dodge | 500 | 266.5 (428.89) | 3:08:23 | 84.88 | Report |
| 1971 | July 11 | Charlie Glotzbach * Raymond Hassler * | Richard Howard | Chevrolet | 500 | 266.5 (428.89) | 2:38:12 | 101.074 | Report |
| 1972 | July 9 | Bobby Allison | Richard Howard | Chevrolet | 500 | 266.5 (428.89) | 2:30:28 | 92.735 | Report |
| 1973 | July 8 | Benny Parsons | L.G. DeWitt | Chevrolet | 500 | 266.5 (428.89) | 2:53:04 | 91.342 | Report |
| 1974 | July 14 | Cale Yarborough | Junior Johnson & Associates | Chevrolet | 500 | 266.5 (428.89) | 3:31:59 | 75.43 | Report |
| 1975 | November 2 | Richard Petty | Petty Enterprises | Dodge | 500 | 266.5 (428.89) | 2:44:49 | 97.016 | Report |
| 1976 | August 29 | Cale Yarborough | Junior Johnson & Associates | Chevrolet | 400 | 213.2 (343.112) | 2:08:59 | 99.175 | Report |
| 1977 | August 28 | Cale Yarborough | Junior Johnson & Associates | Chevrolet | 400 | 213.2 (343.112) | 2:40:27 | 79.726 | Report |
| 1978 * | August 26 | Cale Yarborough | Junior Johnson & Associates | Oldsmobile | 500 | 266.5 (428.89) | 3:25:00 | 88.628 | Report |
| 1979 | August 25 | Darrell Waltrip | DiGard Motorsports | Chevrolet | 500 | 266.5 (428.89) | 2:54:46 | 91.493 | Report |
| 1980 | August 23 | Cale Yarborough | Junior Johnson & Associates | Chevrolet | 500 | 266.5 (428.89) | 3:03:51 | 86.973 | Report |
| 1981 | August 22 | Darrell Waltrip | Junior Johnson & Associates | Buick | 500 | 266.5 (428.89) | 3:08:44 | 84.723 | Report |
| 1982 | August 28 | Darrell Waltrip | Junior Johnson & Associates | Buick | 500 | 266.5 (428.89) | 2:49:32 | 94.318 | Report |
| 1983 | August 27 | Darrell Waltrip | Junior Johnson & Associates | Buick | 418* | 222.794 (358.552) | 2:29:50 | 89.43 | Report |
| 1984 | August 25 | Terry Labonte | Hagan Racing | Chevrolet | 500 | 266.5 (428.89) | 3:07:19 | 85.365 | Report |
| 1985 | August 24 | Dale Earnhardt | Richard Childress Racing | Chevrolet | 500 | 266.5 (428.89) | 3:27:44 | 81.388 | Report |
| 1986 | August 23 | Darrell Waltrip | Junior Johnson & Associates | Chevrolet | 500 | 266.5 (428.89) | 3:03:55 | 86.934 | Report |
| 1987 | August 22 | Dale Earnhardt | Richard Childress Racing | Chevrolet | 500 | 266.5 (428.89) | 2:56:56 | 90.373 | Report |
| 1988 | August 27 | Dale Earnhardt | Richard Childress Racing | Chevrolet | 500 | 266.5 (428.89) | 3:22:59 | 78.775 | Report |
| 1989 | August 26 | Darrell Waltrip | Hendrick Motorsports | Chevrolet | 500 | 266.5 (428.89) | 3:04:14 | 85.554 | Report |
| 1990 | August 25 | Ernie Irvan | Morgan-McClure Motorsports | Chevrolet | 500 | 266.5 (428.89) | 2:54:13 | 91.782 | Report |
| 1991 | August 24 | Alan Kulwicki | AK Racing | Ford | 500 | 266.5 (428.89) | 3:14:56 | 82.028 | Report |
| 1992 | August 29 | Darrell Waltrip | DarWal, Inc. | Chevrolet | 500 | 266.5 (428.89) | 2:55:20 | 91.198 | Report |
| 1993 | August 28 | Mark Martin | Roush Racing | Ford | 500 | 266.5 (428.89) | 3:01:21 | 88.172 | Report |
| 1994 | August 27 | Rusty Wallace | Penske Racing | Ford | 500 | 266.5 (428.89) | 2:55:01 | 91.363 | Report |
| 1995 | August 26 | Terry Labonte | Hendrick Motorsports | Chevrolet | 500 | 266.5 (428.89) | 3:15:03 | 81.979 | Report |
| 1996 | August 24 | Rusty Wallace | Penske Racing | Ford | 500 | 266.5 (428.89) | 2:55:12 | 91.267 | Report |
| 1997 | August 23 | Dale Jarrett | Robert Yates Racing | Ford | 500 | 266.5 (428.89) | 3:19:51 | 80.013 | Report |
| 1998 | August 22 | Mark Martin | Roush Racing | Ford | 500 | 266.5 (428.89) | 3:03:54 | 86.949 | Report |
| 1999 | August 28 | Dale Earnhardt | Richard Childress Racing | Chevrolet | 500 | 266.5 (428.89) | 2:55:11 | 91.276 | Report |
| 2000 | August 26 | Rusty Wallace | Penske Racing | Ford | 500 | 266.5 (428.89) | 3:07:15 | 85.394 | Report |
| 2001 | August 25 | Tony Stewart | Joe Gibbs Racing | Pontiac | 500 | 266.5 (428.89) | 3:07:53 | 85.106 | Report |
| 2002 | August 24 | Jeff Gordon | Hendrick Motorsports | Chevrolet | 500 | 266.5 (428.89) | 3:27:24 | 77.097 | Report |
| 2003 | August 23 | Kurt Busch | Roush Racing | Ford | 500 | 266.5 (428.89) | 3:26:32 | 77.421 | Report |
| 2004 | August 28 | Dale Earnhardt, Jr. | Dale Earnhardt, Inc. | Chevrolet | 500 | 266.5 (428.89) | 3:00:36 | 88.538 | Report |
| 2005 | August 27 | Matt Kenseth | Roush Racing | Ford | 500 | 266.5 (428.89) | 3:08:50 | 84.678 | Report |
| 2006 | August 26 | Matt Kenseth | Roush Racing | Ford | 500 | 266.5 (428.89) | 2:57:37 | 90.025 | Report |
| 2007 | August 25 | Carl Edwards | Roush Fenway Racing | Ford | 500 | 266.5 (428.89) | 2:59:39 | 89.006 | Report |
| 2008 | August 23 | Carl Edwards | Roush Fenway Racing | Ford | 500 | 266.5 (428.89) | 2:54:36 | 91.581 | Report |
| 2009 | August 22 | Kyle Busch | Joe Gibbs Racing | Toyota | 500 | 266.5 (428.89) | 3:08:31 | 80.24 | Report |
| 2010 | August 21 | Kyle Busch | Joe Gibbs Racing | Toyota | 500 | 266.5 (428.89) | 2:41:24 | 99.071 | Report |
| 2011 | August 27 | Brad Keselowski | Penske Racing | Dodge | 500 | 266.5 (428.89) | 2:45:16 | 96.753 | Report |
| 2012 | August 25 | Denny Hamlin | Joe Gibbs Racing | Toyota | 500 | 266.5 (428.89) | 3:09:27 | 84.402 | Report |
Question:
When was an average speed of 81.388 mph recorded?
Answer:
August 24