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:
List of Trans-AMA motocross champions
Table title:
Trans-AMA champions
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Rider </th><th colspan=1 rowspan=1 > Country </th><th colspan=1 rowspan=1 > Machine </th></tr>
<tr> <th colspan=1 rowspan=1 > 1970 </th><td colspan=1 rowspan=1 > United Kingdom Dave Nicoll </td><td colspan=1 rowspan=1 > United Kingdom </td><td colspan=1 rowspan=1 > BSA </td></tr>
<tr> <th colspan=1 rowspan=1 > 1971 </th><td colspan=1 rowspan=1 > Belgium Sylvain Geboers </td><td colspan=1 rowspan=1 > Belgium </td><td colspan=1 rowspan=1 > Suzuki </td></tr>
<tr> <th colspan=1 rowspan=1 > 1972 </th><td colspan=1 rowspan=1 > Sweden Åke Jonsson </td><td colspan=1 rowspan=1 > Sweden </td><td colspan=1 rowspan=1 > Maico </td></tr>
<tr> <th colspan=1 rowspan=1 > 1973 </th><td colspan=1 rowspan=1 > West Germany Adolf Weil </td><td colspan=1 rowspan=1 > West Germany </td><td colspan=1 rowspan=1 > Maico </td></tr>
<tr> <th colspan=1 rowspan=1 > 1974 </th><td class="highlighted"  colspan=1 rowspan=1 > Belgium Roger De Coster </td><td colspan=1 rowspan=1 > Belgium </td><td colspan=1 rowspan=1 > Suzuki </td></tr>
<tr> <th colspan=1 rowspan=1 > 1975 </th><td class="highlighted"  colspan=1 rowspan=1 > Belgium Roger De Coster </td><td colspan=1 rowspan=1 > Belgium </td><td colspan=1 rowspan=1 > Suzuki </td></tr>
<tr> <th colspan=1 rowspan=1 > 1976 </th><td class="highlighted"  colspan=1 rowspan=1 > Belgium Roger De Coster </td><td colspan=1 rowspan=1 > Belgium </td><td colspan=1 rowspan=1 > Suzuki </td></tr>
<tr> <th colspan=1 rowspan=1 > 1977 </th><td class="highlighted"  colspan=1 rowspan=1 > Belgium Roger De Coster </td><td colspan=1 rowspan=1 > Belgium </td><td colspan=1 rowspan=1 > Suzuki </td></tr>
<tr> <th colspan=1 rowspan=1 > 1978 </th><td colspan=1 rowspan=1 > United States Bob Hannah </td><td colspan=1 rowspan=1 > United States </td><td colspan=1 rowspan=1 > Yamaha </td></tr>
</table>
Question:
Who won the most Trans-AMA motocross series and how many did they win?
Answer:
Roger De Coster was a four-time winner of the Trans-AMA motocross series.