1936 - Country Workers
Austria 29.539
Czechoslovakia 67.784
Danzig 6.692
Hungary 2.536
Italy 7.597
Netherlands 22.281
Poland 33.131
Switzerland 13.597
Yugoslavia 5.126
Others 31.909
Total 220.192
1937 - Country Workers
Austria 41.169
Czechoslovakia 81.296
Danzig 12.034
Hungary 2.810
Italy 8.521
Netherlands 26.350
Poland 36.324
Switzerland 15.434
Yugoslavia 6.208
Others 38.353
Total 265.689
1938 - Country Workers
Austria 69.063
Czechoslovakia 105.493
Danzig 17.527
Hungary 5.212
Italy 10.100
Netherlands 30.801
Poland 69.299
Switzerland 16.966
Yugoslavia 9.633
Others 40.984
Total 375.078
May 1939 - Country Workers
Belgium 4.355
Denmark 5.112
France 6.669
Hungary 30.611
Italy 88.324
Netherlands 84.543
Poland 139.441
Yugoslavia 53.618
Others 526.713
Total 939.386
Sep 1941 - Country Workers
Belgium 121.000
Czechoslovakia 158.000
France 1.001.00
Italy 271.000
Netherlands 92.000
Poland 1.025.000
Soviet Union 257.000
Yugoslavia 108.000
Others 343.000
Total 3.506.000
Nov 1942 - Country Workers
Belgium 130.000
Czechoslovakia 193.000
France 1.065.000
Italy 198.000
Netherlands 155.000
Poland 1.315.000
Soviet Union 1.612.000
Yugoslavia 117.000
Others 118.000
Total 4.665.000
1944 - Country Workers
Belgium 253.648
Czechoslovakia 280.273
France 1.254.749
Italy 585.337
Netherlands 270.304
Poland 1.688.080
Soviet Union 2.758.312
Total 7.615.970

Sources used

Ulrich Herbert - Hitler's foreign workers