Performance cookies

These cookies are used to measure how many users visit the website and for how long, what pages are visited, and which links are used (for example, activated or clicked on). We interpret these measures to monitor how well online services are performing.

They contain no personal information, and are evaluated in terms of pages visited, not the people visiting them.

Cookies requested for Google Analytics

__utma

This cookie:  

  • Contains: A randomly generated number
  • Expires: Two years
  • Notes: A persistent cookie that remains on a computer unless it expires or the cookie cache is cleared. It tracks visitors within the site. Metrics associated with the Google __utma cookie include: first visit (unique visit) and last visit (returning visit).

__utmb

This cookie:

  • Contains: A randomly generated number
  • Expires: Thirty minutes
  • Notes: This cookie works with __utmc. It notes the browser's arrival time, and __utmc notes the exit time from the site. A timestamp of 30 minutes must pass before __utmb expires, and if no new page view is sent in thirty minutes the cookie is expired.

__utmc

This cookie:

  • Contains: A randomly generated number
  • Expires: When you close your browser
  • Notes: This cookie works with __utmb to record how long a browser spends on the site. See notes on the __utmb cookie.

__utmz

This cookie:

  • Contains: A randomly generated number and information about how the browser arrived, e.g.: 105385856.1335534567.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)
  • Expires: Six months
  • Notes: Cookie __utmz notes where a visit arrived from, with the referrer shown as type (direct, social, search engine (organic or cpc), or unaccounted). The __utmz Cookie also registers what keyword(s) generated the visit if it came from search, plus the approximate location of the browser.