diff --git a/geostat.cpp b/geostat.cpp
index 5b89d0f..f48e116 100644
--- a/geostat.cpp
+++ b/geostat.cpp
@@ -429,6 +429,7 @@ int main(int argc, char** argv) {
 		show_histogram(cc, &Cache::year, "Years", 1, 0);
 
 //		DT matrix
+		n = 0;
 
 		std::cout << "<h2>Difficulty / terrain matrix</h2>\n";
 		std::cout << "<table class=\"dt\">\n";
@@ -444,8 +445,10 @@ int main(int argc, char** argv) {
 				count = std::count_if(cc.begin(), cc.end(), [i, j](Cache c) { return (c.diff == i / 2.0 && c.terr == j / 2.0); });
 				if (count == 0)
 					std::cout << "<td class=\"dt_zero\">" << 0 << "</td>";
-				else
+				else {
 					std::cout << "<td>" << count << "</td>";
+					n++;
+				}
 			}
 			std::cout << "</tr>\n";
 		}
@@ -475,8 +478,10 @@ int main(int argc, char** argv) {
 						std::cout << "<td class=\"dt_null\"></td>";
 					else
 						std::cout << "<td class=\"dt_zero\">" << 0 << "</td>";
-				} else
+				} else {
 					std::cout << "<td>" << count << "</td>";
+					n++;
+				}
 			}
 			std::cout << "</tr>\n";
 		}