Hello from Tokyo.
The following link contains the quantity (not the quality) statistics for the productive 20 SLR stations last year. Please have a look.
Pass-based hit rate and Normal-point(NP)-based hit rate.
Average number of normal points per pass.
Average pass duration, defined as the time between the 1st and the last NP.
http://geo.science.hit-u.ac.jp/2016/04/05/slr-hit-rate-2015/Yarragadee's hit rates are really awesome. Note that the hit rate of the microwave techniques will be almost 100%.
I would also like to point out that some stations do not (try to?) track a satellite for a long time as seen in Figure 3. I think low orbiters should be observed from horizon to horizon unless there is a conflict with other low orbiters.
Toshi
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Toshimichi Otsubo <t.otsubo@r.hit-u.ac.jp>
Hitotsubashi University