Update prevalence after inspection of zooqle.com.

Towards #956

trackers/doubleclick.net/index.md

@@ -45,7 +45,7 @@ Some sites (like [heise.de](/sites/heise.de)) have begun to embedding DoubleClic
 ## Prevalence
 
 <!-- prevalence -->
-**Pandemic:** found on 57.1% of surveyed sites (4160 instances observed).
+**Pandemic:** found on 57.1% of surveyed sites (4161 instances observed).
 <!-- /prevalence -->
 
 

trackers/google-analytics.com/index.md

@@ -34,7 +34,7 @@ google-analytics.com
 ## Prevalence
 
 <!-- prevalence -->
-**Pandemic:** found on 64.2% of surveyed sites (4675 instances observed).
+**Pandemic:** found on 64.2% of surveyed sites (4676 instances observed).
 <!-- /prevalence -->