Here is my solution:
<pre><asp:SqlDataSource ID="SqlDataSourceFiveYear" runat="server"
ConnectionString="<%$ ConnectionStrings:HotSpotConnectionString %>"
SelectCommand="SELECT [INST_ID], [SHORTNAME], [FTE2013], [FTE2014], [FTE2015], [FTE2016], [FTE2017], [HC2013], [HC2014], [HC2015], [HC2016], [HC2017] FROM [FTE2018Total] ORDER BY [INST_ID]"
FilterExpression="INST_ID = '{0}'">
<FilterParameters>
<asp:ControlParameter Name="INST_ID" ControlID="DropDownList1" PropertyName="SelectedValue" />
</FilterParameters>
</asp:SqlDataSource>
This code was edited at the GridView SQL Data Source.