Transpose des colonnes Excel inégales en lignes [fermé]

J'ai reçu un tableau Excel avec un nombre différent d'éléments par catégorie:

Category A   Category B   Category C
22           11           1
34           15           6
55           4            18
33
36

J'aimerais transformer ceci en:

Category     Item
Category A   22
Category A   34
Category A   55
Category A   33
Category A   36
Category B   11
Category B   15
[...]

Quel est un moyen rapide d'y parvenir?

Une macro le fera facilement. La macro ci-dessous mettra le résultat dans une nouvelle feuille de calcul.

Sub TransposeStuff()
Dim lLastRow As Long, lColLoop As Long, lLastCol As Long
Dim shtOrg As Worksheet, shtDest As Worksheet

'turn off updates to speed up code execution
With Application
    .ScreenUpdating = False
    .EnableEvents = False
    .Calculation = xlCalculationManual
End With


Set shtOrg = ActiveSheet
Set shtDest = Sheets.Add

shtDest.[a1] = "Category"
shtDest.[B1] = "Item"

lLastCol = shtOrg.Cells(1, Columns.Count).End(xlToLeft).Column


For lColLoop = 1 To lLastCol
    lLastRow = shtOrg.Cells(Rows.Count, lColLoop).End(xlUp).Row

    shtOrg.Range(shtOrg.Cells(2, lColLoop), shtOrg.Cells(lLastRow, lColLoop)).Copy
        shtDest.Cells(Rows.Count, 2).End(xlUp).Offset (1)

    shtDest.Range(shtDest.Cells(Rows.Count, 1).End(xlUp).Offset(1), _
                    shtDest.Cells(Rows.Count, 2).End(xlUp).Offset(, -1)).Value = shtOrg.Cells(1, lColLoop)

Next lColLoop

With Application
    .ScreenUpdating = True
    .EnableEvents = True
    .Calculation = xlCalculationAutomatic
End With

End Sub