@fixer1234: That is impressive but not astonishing.  Here on Super User, I, singlehandedly, have done 10.3% of the Reopen Vote reviews; you have done 9.975% of the Close Vote reviews and over 7% of the Low Quality Post reviews; and DavidPostill has done almost 6.6% of the First Post Reviews.  On U&L, Anthon has done 9.1% of Reopen Votes, 8.94% of Late Answers, 8.75% of Close Votes, and 8.45% of LQP.

By the way, you can use URLs like this to get review (and badge) statistics.  The first number in the URL is 1 for Suggested Edits, 2 for Close Votes, 3 for Low Quality Posts, 4 for First Posts, 5 for Late Answers, and 6 for Reopen Votes; the second number is the user’s ID number.  The string under the user’s name is rep and badge counts, all run together.  The next two lines are review statistics. So KP has 1033 First Posts reviews.