Read this article and answer this question Plague was one of the hazards of life in Britain from its dramatic appearance in 1348 with the Black Death. The Bills of Mortality began to be published regularly in 1603, in which year 33,347 deaths were recorded from plague. Between then and 1665, only four years had no recorded cases. In 1563, a thousand people were reportedly dying in London each week. In 1593, there were 15,003 deaths, 1625 saw 41,313 dead, between 1640 and 1646 came 11,000 deaths, culminating  in 3,597 for 1647. The 1625 outbreak was recorded at the time as the Great Plague, Until 1665, surpassed it. These official figures are likely to under-report actual numbers.
Which years saw less than 20000 plague deaths?
1593