Sorting column in datagridview populated by array

Below is my code. I need to sort the output of the "z" column descending by value. Any ideas?

Private Sub btnTableDeg_Click(sender As Object, e As EventArgs) Handles btnTableDeg.Click

' Clears rows on button press and builds columns
DataGridView1.Rows.Clear()
DataGridView1.ColumnCount = 3

DataGridView1.Columns(0).HeaderText = "Field of Study"
DataGridView1.Columns(1).HeaderText = "1981"
DataGridView1.Columns(2).HeaderText = "2006"

' One dimensional arrays initializing values
Dim x() As String = {("Business"), ("Computer & info.science"), ("Education"), ("Engineering"), ("Social science and history")}
Dim y() As Integer = {("200,521"), ("15,121"), ("108,074"), ("63,642"), ("100,513")}
Dim z() As Integer = {("318,042"), ("47,480"), ("107,238"), ("67,045"), ("161,485")}

'Calling output from arrays for datagridview
DataGridView1.Rows.Add(x(0), (y(0)), z(0))
DataGridView1.Rows.Add(x(1), (y(1)), z(1))
DataGridView1.Rows.Add(x(2), (y(2)), z(2))
DataGridView1.Rows.Add(x(3), (y(3)), z(3))
DataGridView1.Rows.Add(x(4), (y(4)), z(4))

End Sub

I presume that the data you have provided is sample data only, and that the real data will come from another and larger source. The simplest and most flexible way is to load the data into a database, and then bind your DataGrid to the database. That way you can sort the data any way you want to simply by changing the record source and refreshing the grid. For example, you can have the program respond to a click on any of the column headers to sort the records according to that particular column.

J.A. Coutts