[Table] header: Year | Date | Driver | Team | Manufacturer | Laps | Miles (km) | Race time | Average speed (mph) | Report row 1 : 1961 | October 22 | Joe Weatherly | Bud Moore Engineering | Pontiac | 500 | 250 (402.336) | 3:27:02 | 72.452 | Report
row 2 : 1962 | July 29 | Jim Paschal | Petty Enterprises | Plymouth | 500 | 250 (402.336) | 3:19:16 | 75.276 | Report
row 3 : 1963 | March 31 | Fireball Roberts | Holman-Moody | Ford | 500 | 250 (402.336) | 3:15:02 | 76.91 | Report
row 4 : 1964 | March 22 | Fred Lorenzen | Holman-Moody | Ford | 500 | 250 (402.336) | 3:27:46 | 72.196 | Report
row 5 : 1966 | March 20 | Dick Hutcherson | Holman-Moody | Ford | 500 | 250 (402.336) | 3:34:26 | 69.952 | Report
row 6 : 1967 | March 19 | David Pearson | Cotton Owens | Dodge | 500 | 250 (402.336) | 3:17:32 | 75.937 | Report
row 7 : 1968 | March 17 | David Pearson | Holman-Moody | Ford | 500 | 250 (402.336) | 3:14:11 | 77.247 | Report
row 8 : 1969 | March 23 | Bobby Allison | Mario Rossi | Dodge | 500 | 250 (402.336) | 3:04:09 | 81.455 | Report
row 9 : 1970 | April 5 | Donnie Allison | Banjo Matthews | Ford | 500 | 266.5 (428.89) | 3:02:42 | 87.543 | Report
row 10 : 1971 | March 28 | David Pearson | Holman-Moody | Ford | 500 | 266.5 (428.89) | 2:52:23 | 91.704 | Report
row 11 : 1972 | April 9 | Bobby Allison | Richard Howard | Chevrolet | 500 | 266.5 (428.89) | 2:50:18 | 92.826 | Report
row 12 : 1973 | March 25 | Cale Yarborough | Richard Howard | Chevrolet | 500 | 266.5 (428.89) | 2:57:43 | 88.952 | Report
row 13 : 1974 | March 17 | Cale Yarborough | Richard Howard | Chevrolet | 450* | 239.85 (386.001) | 3:42:50 | 64.533 | Report
row 14 : 1975 | March 16 | Richard Petty | Petty Enterprises | Dodge | 500 | 266.5 (428.89) | 2:43:53 | 97.053 | Report
row 15 : 1976 | March 14 | Cale Yarborough | Junior Johnson & Associates | Chevrolet | 400 | 213.2 (343.112) | 2:25:24 | 87.377 | Report
row 16 : 1977 | April 17 | Cale Yarborough | Junior Johnson & Associates | Chevrolet | 500 | 266.5 (428.89) | 2:38:20 | 100.989 | Report
row 17 : 1978 | April 2 | Darrell Waltrip | DiGard Motorsports | Chevrolet | 500 | 266.5 (428.89) | 2:53:03 | 92.401 | Report
row 18 : 1979 | April 1 | Dale Earnhardt | Rod Osterlund Racing | Chevrolet | 500 | 266.5 (428.89) | 2:55:39 | 91.033 | Report
row 19 : 1980 | March 30 | Dale Earnhardt | Rod Osterlund Racing | Chevrolet | 500 | 266.5 (428.89) | 2:44:53 | 96.977 | Report
row 20 : 1981 | March 29 | Darrell Waltrip | Junior Johnson & Associates | Buick | 500 | 266.5 (428.89) | 2:58:36 | 89.53 | Report
row 21 : 1982 | March 14 | Darrell Waltrip | Junior Johnson & Associates | Buick | 500 | 266.5 (428.89) | 2:49:52 | 94.025 | Report
row 22 : 1983 | May 21 | Darrell Waltrip | Junior Johnson & Associates | Chevrolet | 500 | 266.5 (428.89) | 2:51:07 | 93.445 | Report
row 23 : 1984 | April 1 | Darrell Waltrip | Junior Johnson & Associates | Chevrolet | 500 | 266.5 (428.89) | 2:50:10 | 93.967 | Report
row 24 : 1985 | April 6* | Dale Earnhardt | Richard Childress Racing | Chevrolet | 500 | 266.5 (428.89) | 3:15:42 | 81.79 | Report
row 25 : 1986 | April 6 | Rusty Wallace | Blue Max Racing | Pontiac | 500 | 266.5 (428.89) | 2:58:14 | 89.747 | Report
row 26 : 1987 | April 12 | Dale Earnhardt | Richard Childress Racing | Chevrolet | 500 | 266.5 (428.89) | 3:31:27 | 75.621 | Report
row 27 : 1988 | April 10 | Bill Elliott | Melling Racing | Ford | 500 | 266.5 (428.89) | 3:12:23 | 83.115 | Report
row 28 : 1989 | April 9 | Rusty Wallace | Blue Max Racing | Pontiac | 500 | 266.5 (428.89) | 3:30:18 | 76.034 | Report
row 29 : 1990 | April 8 | Davey Allison | Robert Yates Racing | Ford | 500 | 266.5 (428.89) | 3:03:15 | 87.258 | Report
row 30 : 1991 | April 14 | Rusty Wallace | Penske Racing | Pontiac | 500 | 266.5 (428.89) | 3:39:37 | 72.809 | Report
row 31 : 1992 | April 5 | Alan Kulwicki | AK Racing | Ford | 500 | 266.5 (428.89) | 3:05:15 | 86.316 | Report
row 32 : 1993 | April 4 | Rusty Wallace | Penske Racing | Pontiac | 500 | 266.5 (428.89) | 3:08:43 | 84.73 | Report
row 33 : 1994 | April 10 | Dale Earnhardt | Richard Childress Racing | Chevrolet | 500 | 266.5 (428.89) | 2:58:22 | 89.647 | Report
row 34 : 1996 | March 31 | Jeff Gordon | Hendrick Motorsports | Chevrolet | 342* | 182.286 (293.36) | 1:59:47 | 91.308 | Report
row 35 : 1997 | April 13 | Jeff Gordon | Hendrick Motorsports | Chevrolet | 500 | 266.5 (428.89) | 3:33:06 | 75.035 | Report
row 36 : 1998 | March 29 | Jeff Gordon | Hendrick Motorsports | Chevrolet | 500 | 266.5 (428.89) | 3:13:00 | 82.85 | Report
row 37 : 1999 | April 11 | Rusty Wallace | Penske Racing | Ford | 500 | 266.5 (428.89) | 2:51:16 | 93.363 | Report
row 38 : 2000 | March 26 | Rusty Wallace | Penske Racing | Ford | 500 | 266.5 (428.89) | 3:01:40 | 88.018 | Report
row 39 : 2001 | March 25 | Elliott Sadler | Wood Brothers Racing | Ford | 500 | 266.5 (428.89) | 3:03:54 | 86.949 | Report
row 40 : 2002 | March 24 | Kurt Busch | Roush Racing | Ford | 500 | 266.5 (428.89) | 3:14:20 | 82.281 | Report
row 41 : 2003 | March 23 | Kurt Busch | Roush Racing | Ford | 500 | 266.5 (428.89) | 3:29:53 | 76.185 | Report
row 42 : 2005 | April 3 | Kevin Harvick | Richard Childress Racing | Chevrolet | 500 | 266.5 (428.89) | 3:26:20 | 77.496 | Report
row 43 : 2006 | March 26 | Kurt Busch | Penske Racing | Dodge | 500 | 266.5 (428.89) | 3:21:19 | 79.427 | Report
row 44 : 2007 * | March 25 | Kyle Busch | Hendrick Motorsports | Chevrolet | 504* | 268.632 (432.321) | 3:16:38 | 81.969 | Report
row 45 : 2008 | March 16 | Jeff Burton | Richard Childress Racing | Chevrolet | 506* | 269.698 (434.036) | 3:00:15 | 89.775 | Report
row 46 : 2009 | March 22 | Kyle Busch | Joe Gibbs Racing | Toyota | 503* | 268.099 (431.463) | 2:54:35 | 92.139 | Report
row 47 : 2010 | March 21 | Jimmie Johnson | Hendrick Motorsports | Chevrolet | 500 | 266.5 (428.89) | 3:20:50 | 79.618 | Report
row 48 : 2011 | March 20 | Kyle Busch | Joe Gibbs Racing | Toyota | 500 | 266.5 (428.89) | 2:53:55 | 91.941 | Report [/Table] Answer this question based on the above table: On how many dates was the average speed of the race 91.033 MPH?

Answer: 1.0