I've now compiled league tables of each country's performance in the history of the Eurovision Song Contest. They are all available
here on my blog. There are actually three tables.
Table 1: each country has been awarded 12 points for each time it's won, 10 points for each time it has finished 2nd, 8 points for each 3rd place, down to 1 point for each time it's come 10th.
Table 2: as above but the totals have been divided by the number of times the country has appeared in the grand final (N.B. Grand final means the single show that happened 1956 to 2003, and the grand final from 2004 onwards). This excludes years from 2004 to present in which a country entered a semi-final but failed to reach the grand final.
Table 3: as above but the totals have been divided by the number of times the country has entered, including years since 2004 when a country failed to qualify from the semi-final it participated in.
Interestingly despite the UK's run of bad results most years since 1999, it is still highly placed in all three tables; top of table 1, 4th in table 2 and 3rd in table 3.