no problem, open table_top_row.html and table_row.html templates from your skins folder and add the appropriate tag:
 
{$unq_in_0_daily} - unique hits in today
{$unq_in_0_weekly} - unique hits in this week
{$unq_in_0_monthly} - unique hits in this month
 
{$unq_out_0_daily} - unique hits out today
{$unq_out_0_weekly} - unique hits out this week
{$unq_out_0_monthly} - unique hits out this month
 
if you want to show 
total in/out instead of unique:
 
{$tot_in_0_daily}
{$tot_in_0_weekly}
 
 
you can also check the user manual for more information on tags: 
http://visiolist.com/docs/styles-design