April 2004 Harper's Index

• Number of states that do not use the word “evolution” in their science curricula : 5
• Amount spent worldwide on mobile-phone ring tones, expressed as a percentage of the global music market : 10
• Number of cents a U.S. woman earned for every dollar that a U.S. man did in 1983 and 2000, respectively : 80.4, 79.7
• Estimated percentage of web links for requests to “unsubscribe” from mass emails that fail : 63