An estimated 20 million people in the United States suffer from neuropathy. More than 30% of those cases stem from diabetes. Approximately half of people with diabetes develop neuropathy. Approximately 30% of people with HIV develop neuropathy. Neuropathy can occur at any age, but it is most common among people 60 and over. Neuropathy results in an annual cost to Medicare of over $3.5 million. Between 2004 and 2005, the National Institutes of Health spent $64 million on researching peripheral neuropathy. Less than 10% of Americans know what neuropathy is. Johnny Cash, Mary Tyler Moore and Andy Griffith all had neuropathy. Sister Dolores Hart, an actress who starred opposite Elvis Presley before joining a convent, has become an active spokesperson for neuropathy awareness.