Of the 23 important newspapers, 10 are dailies, 4 in Sinhala, and 3 each in Tamil and English; 11 are Sunday editions, 5 in Sinhala, 2 in Tamil, and 4 in English; 1 publication appears only on Wednesdays and another only on Saturdays. Circulation figures are not made public by the newspaper groups because of the acute competition in advertising. Comparing and collating the data given by The Editor and Publisher International Yearbook (1999) and the Paris-based World Association of Newspapers, the total circulation of all newspapers may be estimated at 587,500 for daily newspapers and 1,415,000 for Sunday newspapers with an estimated total readership of about 3.5 times those numbers. Of these, two newspapers have a circulation exceeding 250,000; three between 100,000 and 140,000; two between 80,000 and 90,000; one over 45,000; two over 20,000 and three below 20,000. The highest circulation is in Sinhala newspapers, at 389,000 daily and 901,000 on Sundays, with Lankadipa and Dinamana closely competing with each other, while the Sunday editions of Silumina and Divayana Irida claim the highest honors. The English newspapers come next, with a total circulation estimated at 132,000 daily with the Daily News having the highest circulation and 407,000 on Sundays. The Sunday Observer, Sunday Leader, and Sunday Island compete for the highest circulation among Sunday papers. The Tamil papers have roughly a combined circulation of 66,500 daily and 107,000 on Sundays, with Thinakaran and Veerakesari and their Sunday editions competing with each other.