How to generate a search that displays a cumulative percentage column?

[kualo]

Hi I have the log below.

           score
1              10     
2              22
3              33
4              36
5              55

Each event has a score range from 0~50
I want to have a cumulative percentage column showing that

greater or equal 40 : 20% 
greater or equal 30 : 60%
greater or equal 20 : 80%
greater or equal 10 : 100%
greater or equal  0 : 100%

[sundareshr]

Try this

... | bin span=10 score | stats count by score | eventstats sum(count) as total | eval percentage=round(count/total, 0)*100 | eval percentage=tostring(percentage, "commas")."%" | replace * WITH "greater or equal to "* IN score | table score percentage