Unit Number | Unit Name | Year | Usage | Spend
1                ABC
2                DEF
3                GHI

Year | Unit Number | Usage | Spend
2014       1          100     $500
2015       1          115     $550
2016       1          130     $750
2014       2          300     $900
2015       2          310     $1,000
2016       2          305     $950