Add histogram for years

geostat.cpp

@@ -312,7 +312,8 @@ int main(int argc, char** argv) {
 	}
 
 	if ((show_calendar || show_html) && !get_not_found) {
-		show_histogram(&cc, &Cache::mon, "Month", show_html, 0);
+		show_histogram(&cc, &Cache::mon, "Months", show_html, 0);
+		show_histogram(&cc, &Cache::year, "Years", show_html, 0);
 	}
 
 	if (show_dt && !get_not_found) {

okapi.cpp

@@ -136,7 +136,7 @@ Caches Okapi::get_caches(std::vector<std::pair<std::string, std::tm>> codes) {
 			for (auto& el2 : codes) {
 				if (el2.first == c.code) {
 					c.date_found = el2.second;
-					c.year = std::to_string(el2.second.tm_year);
+					c.year = std::to_string(1900+el2.second.tm_year);
 					std::strftime(month, 20, "(%m) %B", &el2.second);
 					c.mon = month;
 					c.day = std::to_string(el2.second.tm_mday);