You can see your reputation history by visiting: http://serverfault.com/reputation
Since SE uses cookies, Cookies Export/import Firefox extension may be useful:
$ wget --load-cookie cookies.txt http://serverfault.com/reputation
$ awk '$1 == "--" && $4 >= +200 { print $0 }' reputation
$ awk '$1 == "--" && $4 >= +200 { s += 1 } END { print s }' reputation