
The kennel club Annual Dog Health report does have some more up to date stats.
http://www.thekennelclub.org.uk/media/455665/dog_health_report_2013_web.pdf page 24 ahs hip stats to November 2013.
Page 28 shows al elbow scores in last 15 years showing the spread of scores.
In 1999 there were 583 dogs elbow scored with normal results of 0 for 70%, 15.3% scored 1, 9.3% scored 2, and 5.5% scored 3.
In 2013 there were 3181 dogs graded with 80.3% normal 0 scores, 11.6% scored 1, 6.1% scored 2, and 2% scored 3.
In 15 years 1975 Bernese were graded, 61.7% normal, 14.2% grade 1, 15.5% grade 2, and 8.6% grade 3.
In Labradors 11437 were scored, with 85.5% normal (0 score), 8.7% grade 1, 4% grade 2, and 1.7% grade 3.
So in Labradors using the vast majority of Labradors score 1, so no real need to sue dogs scoring 1.
Assuming there has been improvement over the years as the general figure shows (from 70% to 80.3% normal) then it is likely that currently even fewer than 15% of Labs score above zero.