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:
Shoujocon
Table title:
Event history
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Dates </th><th colspan=1 rowspan=1 > Location </th><th colspan=1 rowspan=1 > Atten. </th><th colspan=1 rowspan=1 > Guests </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > July 15–16, 2000 </td><td colspan=1 rowspan=1 > Newark Gateway Hilton Newark, New Jersey </td><td class="highlighted"  colspan=1 rowspan=1 > 456 </td><td colspan=1 rowspan=1 > Roxanne Beck, Mandy Bonhomme </td></tr>
<tr> <td colspan=1 rowspan=1 > July 14–15, 2001 </td><td colspan=1 rowspan=1 > East Brunswick Hilton East Brunswick, New Jersey </td><td class="highlighted"  colspan=1 rowspan=1 > 1,252 </td><td colspan=1 rowspan=1 > Katsumi Kurata, Ryo Hitaka, Mandy Bonhomme, Colleen Doran </td></tr>
<tr> <td colspan=1 rowspan=1 > July 19–21, 2002 </td><td colspan=1 rowspan=1 > East Brunswick Hilton East Brunswick, New Jersey </td><td colspan=1 rowspan=1 > 1,229 </td><td colspan=1 rowspan=1 > Mandy Bonhomme, Friends of Lulu, Azusa Kurokawa, Jamie McGonnigal, Liam O'Brien, and Umbrella Studios. </td></tr>
<tr> <td colspan=1 rowspan=1 > August 22–24, 2003 </td><td colspan=1 rowspan=1 > Rye Town Hilton Rye Brook, New York </td><td colspan=1 rowspan=1 > 600 </td><td colspan=1 rowspan=1 > Katie Bair, Kelli Shayne Butler, Tiffany Grant, and Jamie McGonnigal. </td></tr>
</table>
Question:
What occurred when Shoujocon was founded?
Answer:
Founded in 2000, Shoujocon grew from 456 attendees to 1,252.