diff --git a/data/custom.csv b/data/custom.csv
new file mode 100644
index 0000000000000000000000000000000000000000..24135937eea58b2fa34a21514a7fad281285f5aa
--- /dev/null
+++ b/data/custom.csv
@@ -0,0 +1,11 @@
+100,90663951
+120,95296758
+140,99153887
+160,102697139
+180,105366636
+200,107780696
+220,109263749
+240,110849197
+260,111540688
+280,112559339
+300,112336645