Update graph displays and supporting helpers

1 files changed, 7 insertions, 0 deletions

diff --git a/country.go b/country.go
index a875f66..d5bbe48 100644
--- a/country.go
+++ b/country.go
@@ -67,6 +67,13 @@ func (cs CountrySet) YMax() int {
 	}
 	return max
 }
+func (cs CountrySet) YSum() int {
+	sum := 0
+	for _, c := range cs {
+		sum += c.hitSet.Count()
+	}
+	return sum
+}
 func (cs CountrySet) XSeries() []*Country {
 	return cs
 }