Dynamic Fields in ASP.NET (VB)

I have a table that I need to populate based off queries from a table on page load.

the ASPX page has the following table layout

<table>
	<tr>
		<td><td>
		<td colspan="4">Year 1</td>
		<td colspan="4">Year 2</td>
		<td colspan="4">Year 3</td>
	</tr>
	<tr>
		<td><td>
		<td>Q1</td>
		<td>Q2</td>
		<td>Q3</td>
		<td>Q4</td>
		<td>Q1</td>
		<td>Q2</td>
		<td>Q3</td>
		<td>Q4</td>
		<td>Q1</td>
		<td>Q2</td>
		<td>Q3</td>
		<td>Q4</td>
	</tr>
	<tr>
		<td>SALES</td>
		<td><asp:Literal ID="Y1Q1" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y1Q2" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y1Q3" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y1Q4" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y2Q1" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y2Q2" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y2Q3" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y2Q4" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y3Q1" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y3Q2" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y3Q3" Text="" runat="server" /></td>
		<td><asp:Literal ID="Y3Q4" Text="" runat="server" /></td>
	</tr>
.................................................

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The data is being pulled in the backend for each year/quarter.

In the code behind I have the following :

Do While xYear < 4
	Select Case xYear
		Case Is = 1
			thisYear = FirstYear.ToString
		Case Is = 2
			thisYear = SecondYear.ToString
		Case Is = 3
			thisYear = ThirdYear.ToString
	End Select

	Do While xQuarter < 5
		Select Case xQuarter
			Case Is = 1
				thisQuarter = 1
			Case Is = 2
				thisQuarter = 2
			Case Is = 3
				thisQuarter = 3
			Case Is = 4
				thisQuarter = 4
		End Select
		
		'This does the query to get the data I will be working with.
		myRecords = Library.GetLFNSTATS(thisYear + thisQuarter)

		For Each row As DataRow In myRecords.Rows

			thisField = "Y" & xYear & "Q" & xQuarter
			thisControl = Me.FindControl(thisField)
			thisControl.text = row("ColumnName").ToString.Trim
			
		Next
		xQuarter += 1
	Loop
	xYear += 1
Loop

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When the code runs, the control referenced by thisControl comes back with nothing.