[tor-relays] Drop in relay count

[Linus Nordberg]

Hi,

Looking at the graphs showing the number of relays in the network it
seems like we've lost about 500 (-7%) relays since the beginning of this
year.

  https://metrics.torproject.org/networksize.html?graph=networksize&start=2015-01-01&end=2015-05-03
  https://metrics.torproject.org/networksize.html?graph=networksize&start=2012-01-01&end=2015-05-03

Looking at the graphs showing the total relay bandwidth of the network
it seems like the advertised bandwidth has increased with about 25 Mbps
(+23%).

  https://metrics.torproject.org/bandwidth.html?graph=bandwidth&start=2015-01-01&end=2015-05-03
  https://metrics.torproject.org/bandwidth.html?graph=bandwidth&start=2012-01-01&end=2015-05-03

Seems a bit contradictory at first sight. A guess would be that a lower
number of fast relays have replaced a higher number of slow ones but I
haven't looked into it more.

Anyone who's looked into this? And can back up their theory with some
numbers.

Thanks,
Linus