Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Hour record
Table title:
Hour record holders (men's)
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Rider </th><th colspan=1 rowspan=1 > Age </th><th colspan=1 rowspan=1 > Velodrome </th><th colspan=1 rowspan=1 > Distance (km) </th><th colspan=1 rowspan=1 > Equipment </th></tr>
<tr> <td colspan=1 rowspan=1 > 19 January 1984 </td><td colspan=1 rowspan=1 > Italy Francesco Moser </td><td colspan=1 rowspan=1 > 32 </td><td colspan=1 rowspan=1 > Agustín Melgar (333 meters outdoor concrete high-altitude), Mexico City, Mexico </td><td colspan=1 rowspan=1 > 50.808 </td><td colspan=1 rowspan=1 > Bullhorn handlebar, oval steel tubing frame, disc wheels. </td></tr>
<tr> <td colspan=1 rowspan=1 > 23 January 1984 </td><td colspan=1 rowspan=1 > Italy Francesco Moser </td><td colspan=1 rowspan=1 > 32 </td><td colspan=1 rowspan=1 > Agustín Melgar (333 meters outdoor concrete high-altitude), Mexico City, Mexico </td><td colspan=1 rowspan=1 > 51.151 </td><td colspan=1 rowspan=1 > Bullhorn handlebar, oval steel tubing frame, disc wheels. </td></tr>
<tr> <td colspan=1 rowspan=1 > 17 July 1993 </td><td colspan=1 rowspan=1 > United Kingdom Graeme Obree </td><td colspan=1 rowspan=1 > 27 </td><td colspan=1 rowspan=1 > Vikingskipet (250 meters indoor wood sea-level), Hamar, Norway </td><td colspan=1 rowspan=1 > 51.596 </td><td colspan=1 rowspan=1 > Graeme Obree-style "praying mantis" handlebar, round steel tubing frame, carbon tri-spoke wheels. </td></tr>
<tr> <td colspan=1 rowspan=1 > 23 July 1993 </td><td colspan=1 rowspan=1 > United Kingdom Chris Boardman </td><td colspan=1 rowspan=1 > 24 </td><td colspan=1 rowspan=1 > Velodrome du Lac (250 meters indoor wood sea-level), Bordeaux, France </td><td colspan=1 rowspan=1 > 52.270 </td><td colspan=1 rowspan=1 > Triathlon handlebar, carbon airfoil tubing frame, carbon 4-spoke wheels. </td></tr>
<tr> <td colspan=1 rowspan=1 > 27 April 1994 </td><td colspan=1 rowspan=1 > United Kingdom Graeme Obree </td><td colspan=1 rowspan=1 > 28 </td><td colspan=1 rowspan=1 > Velodrome du Lac (250 meters indoor wood sea-level), Bordeaux, France </td><td colspan=1 rowspan=1 > 52.713 </td><td colspan=1 rowspan=1 > Graeme Obree-style "praying mantis" handlebar, round steel tubing frame, carbon tri-spoke wheels. </td></tr>
<tr> <td colspan=1 rowspan=1 > 2 September 1994 </td><td colspan=1 rowspan=1 > Spain Miguel Indurain </td><td colspan=1 rowspan=1 > 30 </td><td colspan=1 rowspan=1 > Velodrome du Lac (250 meters indoor wood sea-level), Bordeaux, France </td><td colspan=1 rowspan=1 > 53.040 </td><td colspan=1 rowspan=1 > Wide triathlon handlebar, carbon monocoque aero frame, disc wheels. </td></tr>
<tr> <td colspan=1 rowspan=1 > 22 October 1994 </td><td colspan=1 rowspan=1 > Switzerland Tony Rominger </td><td colspan=1 rowspan=1 > 33 </td><td colspan=1 rowspan=1 > Velodrome du Lac (250 meters indoor wood sea-level), Bordeaux, France </td><td colspan=1 rowspan=1 > 53.832 </td><td colspan=1 rowspan=1 > Triathlon handlebar, oval steel tubing frame, disc wheels. </td></tr>
<tr> <td colspan=1 rowspan=1 > 5 November 1994 </td><td colspan=1 rowspan=1 > Switzerland Tony Rominger </td><td colspan=1 rowspan=1 > 33 </td><td colspan=1 rowspan=1 > Velodrome du Lac (250 meters indoor wood sea-level), Bordeaux, France </td><td colspan=1 rowspan=1 > 55.291 </td><td colspan=1 rowspan=1 > Triathlon handlebar, oval steel tubing frame, disc wheels. </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 6 September 1996 </td><td class="highlighted"  colspan=1 rowspan=1 > United Kingdom Chris Boardman </td><td colspan=1 rowspan=1 > 28 </td><td colspan=1 rowspan=1 > Manchester Velodrome (250 meters indoor wood sea-level), Manchester, UK </td><td class="highlighted"  colspan=1 rowspan=1 > 56.375 </td><td class="highlighted"  colspan=1 rowspan=1 > Graeme Obree "superman-style" handlebar, carbon monocoque aero frame, 5-spoke front and rear disc wheel. </td></tr>
</table>
Question:
When did Boardman set the record of 56.375 km?
Answer:
Boardman set the Hour record of 56.375 km in 1996, using Obree.