Cannabis is mostly used for recreation or as a medicinal drug, although it may also be used for spiritual purposes. In 2013, between 128 and 232 million people used cannabis (2.7% to 4.9% of the global population between the ages of 15 and 65).[29] It is the most commonly used illegal drug both in the world and the United States,[22][29] though it is also legal in some jurisdictions. The countries with the highest use among adults as of 2018[update] are Zambia, the United States, Canada, and Nigeria.[30] In 2016, 51% of people in the United States had used cannabis in their lifetimes.[31] About 12% had used it in the past year, and 7.3% had used it in the past month.[32]