observance of the Lord's Day often takes the form of attending the Sunday morning service of worship, receiving catechesis through Sunday School, performing acts of mercy (such as evangelism, visiting prisoners in jails and seeing the sick at hospitals), and attending the Sunday evening service of worship, as well as refraining from Sunday shopping, servile work, playing sports, viewing the television, and dining at restaurants. The majority of Christian denominations hold church services on the Lord's Day (with many offering Sunday morning and Sunday evening services); a number of traditions have mid-week Wednesday evening services as well. In some Christian denominations, church services are held daily, with these including those in which the canonical hours are prayed, as well as the offering of the Mass, among other forms of worship. In addition to this, many Christians attend services of worship on holy days such as Christmas, Ash Wednesday, Good Friday, Ascension Thursday, among others depending on the Christian denomination. Statistics The Gallup International, a self-reporting survey conducted via telephone, indicates that 37% of Americans report that they attend religious services weekly or near-weekly in 2013. Self-reporting surveys conducted online indicate substantially lower weekly attendance rates, and methods of measurement that do not rely on self-reporting estimate even lower rates; for instance, a 2005 study published in the Journal for the Scientific Study of Religion found that just 22% of Americans attend services weekly. This compares to other countries' claims such as 15% of French citizens, 10% of British citizens, 8.8% of Australian citizens and 5.6% of Dutch citizens. In the U.K., in 2011, an average once-a-week attendance in Anglican churches went down by 0.3% compared with 2012, thus exhibiting a stabilizing trend. Previously, starting from 2000, an average rate of weekly church attendance in Britain was dropping down 1% annually. In 2013, the Pew Research Center reported that 37% of all Americans attended church on a weekly basis. In its turn, Gallup estimated the once-a-week church attendance of the Americans in 2013 as 39%. Based on 1990–1991 data, it was estimated that the country with the highest rate of church attendance in the world was Nigeria (89%) and with the lowest – the Soviet Union (2%). Nigeria's data was notable, as Nigeria is very religiously diverse – the population is 50.1% Muslim and 48.2% Christian. The state authorities in the USSR, which dissolved in 1991, discouraged church construction; they had