Mormon's often try and use the claim that they are the fastest growing church on the face of the earth. Excluding those who are baptized at the age of eight, the only real way to gauge that is the convert-baptism rate.
This information is released in the May (Conference editions) of the Ensign magazine.
1990 – 330, 877
1991 – 297, 770
1992 – 274, 477
1993 – 304, 808
1994 – 300, 730
1995 – 304, 330
1996 – 321, 385
1997 – 317,798
1998 – 299, 1341999 – 306, 171
2000 – 273, 973
2001 – 292, 612
2002 – 283, 138
2003 – 242, 943
2004 – 241, 239
2005 – 243,108
2006 – 272,845
2007 – 279,218
2008 – 265,593
2009 – 280,106
2010 – 272,814
Not being able to see how many of these are from third world countries where the internet isn't as accessible, we can clearly see that their 52,000+ missionaries are needing the help of the LDS PR machine. Expect more "And I'm a Mormon" commercials to come.