Table 1 Descriptive statistics for the over 65 s
From: The impact of Medicare part D on income-related inequality in pharmaceutical expenditure
|  | 1997–99 | 2000–02 | 2003–05 | 2006–08 | 2009–11 |
|---|---|---|---|---|---|
    Percentage of sample | |||||
Male | 42.1 | 42.3 | 42.9 | 42.9 | 43.7 |
Ethnicity | |||||
 White | 84.3 | 82.8 | 81.1 | 79.7 | 79.3 |
 Black | 8.29 | 8.34 | 8.28 | 8.54 | 8.53 |
 Hispanic | 5.18 | 5.67 | 6.23 | 6.96 | 7.22 |
 Other | 2.22 | 3.24 | 4.42 | 4.80 | 4.91 |
Medicare Part D Coverage | – | – | – | 54.5 | 61.0 |
     2012 US dollars | |||||
Income (thousands) | 34.4 (31.1) | 34.0 (29.2) | 35.6 (30.3) | 37.9 (33.3) | 39.1 (34.4) |
Total drug expenditure | 1151 (1514) | 1569 (1987) | 2144 (4037) | 2287 (3340) | 2275 (3678) |
 OOP | 671 (1076) | 865 (1278) | 1092 (1617) | 686 (1144) | 525 (888) |
 Public | 257 (714) | 410 (1185) | 565 (1533) | 1263 (2427) | 1299 (2883) |
 Private | 223 (687) | 295 (838) | 486 (3356) | 337 (1530) | 450 (1520) |
Observations | 9516 | 11,102 | 11,225 | 11,004 | 11,817 |