Sex Age group Book format Total BOTH SEX Total [18, 65 ] Only e-books 1.42 BOTH SEX Total [18, 65 ] Only paper books 92.13 BOTH SEX Total [18, 65 ] Both e-books and paper books 6.45 BOTH SEX Subtotal [25, 64] Only e-books 1.38 BOTH SEX Subtotal [25, 64] Only paper books 92.41 BOTH SEX Subtotal [25, 64] Both e-books and paper books 6.21 BOTH SEX 18 to 24 years old Only e-books . BOTH SEX 18 to 24 years old Only paper books 89.80 BOTH SEX 18 to 24 years old Both e-books and paper books 8.40 BOTH SEX 25 to 34 years old Only e-books 2.01 BOTH SEX 25 to 34 years old Only paper books 90.58 BOTH SEX 25 to 34 years old Both e-books and paper books 7.40 BOTH SEX 35 to 44 years old Only e-books 1.44 BOTH SEX 35 to 44 years old Only paper books 91.85 BOTH SEX 35 to 44 years old Both e-books and paper books 6.71 BOTH SEX 45 to 54 years old Only e-books 1.10 BOTH SEX 45 to 54 years old Only paper books 93.39 BOTH SEX 45 to 54 years old Both e-books and paper books 5.51 BOTH SEX 55 to 65 years old Only e-books . BOTH SEX 55 to 65 years old Only paper books 94.71 BOTH SEX 55 to 65 years old Both e-books and paper books 4.59 MALE Total [18, 65 ] Only e-books 1.98 MALE Total [18, 65 ] Only paper books 89.42 MALE Total [18, 65 ] Both e-books and paper books 8.60 MALE Subtotal [25, 64] Only e-books 1.99 MALE Subtotal [25, 64] Only paper books 89.54 MALE Subtotal [25, 64] Both e-books and paper books 8.47 MALE 18 to 24 years old Only e-books . MALE 18 to 24 years old Only paper books 88.19 MALE 18 to 24 years old Both e-books and paper books 9.81 MALE 25 to 34 years old Only e-books 3.00 MALE 25 to 34 years old Only paper books 87.23 MALE 25 to 34 years old Both e-books and paper books 9.77 MALE 35 to 44 years old Only e-books 2.12 MALE 35 to 44 years old Only paper books 89.35 MALE 35 to 44 years old Both e-books and paper books 8.53 MALE 45 to 54 years old Only e-books . MALE 45 to 54 years old Only paper books 90.30 MALE 45 to 54 years old Both e-books and paper books 8.32 MALE 55 to 65 years old Only e-books . MALE 55 to 65 years old Only paper books 92.37 MALE 55 to 65 years old Both e-books and paper books 6.55 FEMALE Total [18, 65 ] Only e-books 0.99 FEMALE Total [18, 65 ] Only paper books 94.20 FEMALE Total [18, 65 ] Both e-books and paper books 4.81 FEMALE Subtotal [25, 64] Only e-books 0.91 FEMALE Subtotal [25, 64] Only paper books 94.61 FEMALE Subtotal [25, 64] Both e-books and paper books 4.47 FEMALE 18 to 24 years old Only e-books . FEMALE 18 to 24 years old Only paper books 90.96 FEMALE 18 to 24 years old Both e-books and paper books 7.38 FEMALE 25 to 34 years old Only e-books . FEMALE 25 to 34 years old Only paper books 93.18 FEMALE 25 to 34 years old Both e-books and paper books 5.57 FEMALE 35 to 44 years old Only e-books . FEMALE 35 to 44 years old Only paper books 93.76 FEMALE 35 to 44 years old Both e-books and paper books 5.32 FEMALE 45 to 54 years old Only e-books . FEMALE 45 to 54 years old Only paper books 95.81 FEMALE 45 to 54 years old Both e-books and paper books 3.31 FEMALE 55 to 65 years old Only e-books . FEMALE 55 to 65 years old Only paper books 96.49 FEMALE 55 to 65 years old Both e-books and paper books 3.09