Strata
1
1
1000 
1000
400
100
+418
1000
1000
400
100
+46
2
6
2
1000
1000
400
100
+101
1000
1000
400
100
+81
1000
1000
400
100
+64
1000
1000
400
100
+79
1000
1000
400
100
+164