Some statistics about my LoTW users list



Number of known callsigns over the time

I started this project in March 2005.

A major effort to build the list was done in July-August 2005, which brought the list to the 9000 calls level.

After that time, with the help of over 700 contributors, the list continued to grow quite regularly, with an average of about 300 new calls each month during 2006 and 2007, continuously increasing up to an average of 900 new calls each month during 2014.

Note: sudden increases of the curve are the result of sometimes using some very effective, but time consuming, sources of new calls. They don't mean that so many users joined LoTW just at those specific dates.

My LoTW QSL rate over the time

Those statistics were established in January 2008 based on almost 15,000 QSO's I entered on the system for the years 1980-2004, mostly HF CW and phone.

In 2005, I started working LoTW participants selectively, so my QSL rate became much higher but has no more statistical meaning.

This graphic shows quite a good QSL rate since about 1997 (around 15 %), an "acceptable" one till 1989 (mostly 4 to 7 %), and a very low one (just above 1 %) for most of the 80's.