Arranging Pivot Table data

I've got a basic pivot table set up as follows:

Year PER 1
Sales Rep1 2006 Units 69,498
2006 Gross $ 1,241,632
2007 Units 76,579
2007 Gross $ 1,262,005
2008 Units 136,081
2008 Gross $ 2,133,336

Above is how the pivot table sets it up...with Period 1 as my "Data" and the
Sales Rep Name and Year set up as my "Row" (According to the "Pivot Table
Wizard"). Ho do I get the pivot table to arrange my "year" so i can see the
Units in year order, then then the Gross $ lined up...