The Times stayed with Times New Roman for 40 years, but new production techniques and the format change from broadsheet to tabloid in 2004 have caused it to switch typeface five times from 1972 to 2007. However, all the new fonts have been variants of the original New Roman typeface. Once released for commercial sale, Times New Roman became extremely successful, becoming Monotype's best-selling typeface of all time in metal type.[18][19]