BBC quotes some numbers on cassette tape sales. In 1989 83 mln cassettes were sold in the UK. In 2004 only 900,000 units were sold in UK. Globally the sales peak arrived in mid-80s, when 900 mln cassettes sold represented 54% of the total music sales. Turkey still sells 88 million cassettes a year, India 80 million, and that cassettes account for 50% of sales in these countries. In Saudi Arabia, it is 70%. Third of all audiobooks is still sold on tape.