st: missing grid line when defining ylabel for a bar graph

[Jacob McDermott <jpmcd87@gmail.com>]

Hello,

For an hbar graph I am extended the yaxis to correspond with the yaxis 
of another hbar. When I do this, the grid line for the final yaxis label 
does not appear. What am I missing? Is there an easy way to add one?

For example:
sysuse auto
graph hbar (mean) price, over(rep78) ylabel(2000 4000 6000 8000 10000)

the grid line at 10,000 does not appear.

Thanks for the help!
Jacob
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