Show total number of posts currently month

HI guy
IN my blog i use this code:

<?php global $numposts, $users; printf(__('There are <strong>%1$s</strong> published articles and <strong>%2$s</strong> registered authors in our article directory.', 'article-directory'), $numposts, $users); ?></p>

for show the total number (no entire posts but the total number) of posts and authors in my blog, but if i want show the total posts for currently month???

Thank for help