idea for new feature of HTML

Don't know where to submit this, but I'll try here.  At some point, I think
it'd make sense for HTML to include a "graph" tag that would generate graphs
based on input and could be formatted through css.  Something like:

<graph type="line" xlabel="month" ylabel="cost">
  <value>1,15</value>
  <value>2,12</value>
  <value>3,16</value>
  <value>4,14</value>
          etc....
</graph>