Jehovah's Witnesses are very focused on preaching and teaching the good news of the kingdom, including missionary work. (Matthew 24:14, 1 Timothy 2:4, Acts 10:34, 35)
Here are the worldwide statistics for the preaching and teaching activity of Jehovah's Witnesses in the past servivce year according the 2014 Yearbook of Jehovah’s Witnesses (the service year is from September - August, so these stats are for September 2012 - August 2013):
- Lands 239
- Publishers 7,965,954 (number of people actively preaching and teaching)
- Total hours spent in the field ministry during the past service year 1,841,180,235
- Bible studies during the past service year 9,254,963.
That same yearbook shows this information for the website jw.org which contains lots of Bible based learning resources:
- 316 Languages in which the Web site is available
- 220,000+ Number of Web pages on the site
- 600 Languages in which downloadable publications are available
- 130 Requests for Bible studies per day from over 230 countries
- 5 million+ Videos viewed per month
- 1.5 million Downloads per day
- 900,000+ Visits per day from over 230 countries
Here are some statistics found in the April 2014 Watchtower magazine for the printing of each issue:
All of Jehovah's Witnesses are expected to have a regular, active share in preaching and teaching.
As far as missionary work goes, according to the lesson "What Is Missionary Service?" from the brochure "Who Are Doing Jehovah’s Will Today?" since 1943, more than 8,000 Gilead-trained missionaries have been sent out to witness in some 200 lands. Unlike most people who claim to do "missionary" work, these missionaries primarily focus on preaching and teaching the Bible. That number of more than 8,000 only includes those sent out after training at Gilead. There are many more who make sacrifices to preach where there is a greater need than where they come from.
Jehovah's Witnesses imitate the greatest missionary, Jesus Christ. He was willing to leave his home and life in the heavens to live as a human for a time. (John 6:38; Philippians 2:7) According to Jesus own words the main purpose of this was to "declare the good news of the kingdom". (Luke 4:43)
For more information please see the lesson "How Can You Recognize True Worship?" from that same brochure.