diff --git a/about/statistics.md b/about/statistics.md
index d6953813..e46e155d 100644
--- a/about/statistics.md
+++ b/about/statistics.md
@@ -23,7 +23,7 @@ Since the graph is updated daily, the bar for the current month will be very low
 
 ### How is the userbase estimated?
 
-We simply count the number of unique IPv4 addresses that connect to the Qubes update servers each month (except for Tor connections; see below).
+We simply count the number of unique IPv4 addresses that connect to the Qubes update servers each month (except for Tor connections; see [below][tor-methodology]).
 
 ### How has the methodology for counting Tor users changed?
 
@@ -42,20 +42,29 @@ Where:
  - `plain_users` is the number of unique clearnet IPv4 addresses that connect to the Qubes update servers each month.
  - `plain_requests` is the total number of requests the Qubes update servers receive from clearnet IPv4 addresses each month.
 
-We cross-reference the list of connecting IP addresses with the official database of Tor exit nodes in order to distinguish Tor and clearnet IPs and requests.
-For this purpose, an IP address counts as belonging to a Tor exit node if there was a Tor exit node active for that address in the past 24 hours.
+We cross-reference the list of connecting IP addresses with [TorDNSEL's exit lists] in order to distinguish Tor and clearnet IPs and requests.
+For this purpose, we count an IP address as belonging to a Tor exit node if there was a Tor exit node active for that address within the 24-hour periods before or after it connected to the Qubes update servers.
 
 ### What kinds of data do you collect about Qubes users?
 
-The only data we collect are:
+We collect:
+
  - The IPv4 addresses that connect to the Qubes update servers
  - The number of requests from each IPv4 address
+ - Standard server access and error logs
 
 We do not collect any other kinds of data about Qubes users.
 
 ### Where can I find the raw data and source code?
 
-The raw data is available [here](https://tools.qubes-os.org/counter/stats.json).
+The raw data is available [here][raw-data].
+(This does not include any personally-identifying user data.)
 Please note that the format of this data is not documented and may change any time if the developers feel the need to include something else.
-The source code is available [here](https://github.com/woju/qubes-stats).
+The source code is available [here][source-code].
+
+
+[tor-methodology]: #how-has-the-methodology-for-counting-tor-users-changed
+[TorDNSEL's exit lists]: https://metrics.torproject.org/collector.html#type-tordnsel
+[raw-data]: https://tools.qubes-os.org/counter/stats.json
+[source-code]: https://github.com/woju/qubes-stats