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:
IBM System/390
Table title:
9672
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Model </th><th colspan=1 rowspan=1 > Year Introduced </th><th colspan=1 rowspan=1 > Number of CPUs </th><th colspan=1 rowspan=1 > Performance (MIPS) </th><th colspan=1 rowspan=1 > Memory (GB) </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > G1 – 9672-Rn1, 9672-Enn, 9672-Pnn </td><td class="highlighted"  colspan=1 rowspan=1 > 1994 </td><td colspan=1 rowspan=1 > 1–6 </td><td colspan=1 rowspan=1 > 15–66 </td><td colspan=1 rowspan=1 > 0.125–2 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > G2 – 9672-Rn2, 9672-Rn3 </td><td colspan=1 rowspan=1 > 1995 </td><td colspan=1 rowspan=1 > 1–10 </td><td colspan=1 rowspan=1 > 15–171 </td><td colspan=1 rowspan=1 > 0.125–4 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > G3 – 9672-Rn4 </td><td colspan=1 rowspan=1 > 1996 </td><td colspan=1 rowspan=1 > 1–10 </td><td colspan=1 rowspan=1 > 33–374 </td><td colspan=1 rowspan=1 > 0.5–8 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > G4 – 9672-Rn5 </td><td colspan=1 rowspan=1 > 1997 </td><td colspan=1 rowspan=1 > 1–10 </td><td colspan=1 rowspan=1 > 49–447 </td><td colspan=1 rowspan=1 > 0.5–16 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > G5 – 9672-nn6 </td><td colspan=1 rowspan=1 > 1998 </td><td colspan=1 rowspan=1 > 1–10 </td><td colspan=1 rowspan=1 > 88–1069 </td><td colspan=1 rowspan=1 > 1–24 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > G6 – 9672-nn7 </td><td colspan=1 rowspan=1 > 1999 </td><td colspan=1 rowspan=1 > 1–12 </td><td colspan=1 rowspan=1 > 178–1644 </td><td colspan=1 rowspan=1 > 5–32 </td></tr>
</table>
Question:
How many generations of the 9672 machines were introduced in 1994?
Answer:
Introduced in 1994, IBM System/390 has six generations of the IBM 9672 machines.