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. 2012 Jun 13;344:e3782. doi: 10.1136/bmj.e3782

Table 1.

 Characteristics of unique climbers and their climbs on constituent Himalayan peaks, 1970-2010. Data are no (%)

Variable Unique climbers Climbs
<8000 m ≥8000 m Total
Sex of climber
 Male 21 555 (89.8) 14 157 (89.9) 21 293 (91.4) 35 450 (90.8)
 Female 2439 (10.2) 1585 (10.1) 2002 (8.6) 3587 (9.2)
 Unknown 1 1 0 1
Age of climber (years)*
 ≤19 161 (0.7) 103 (0.7) 87 (0.4) 190 (0.5)
 20-29 7378 (30.8) 4619 (29.3) 5126 (22.0) 9745 (25.0)
 30-39 8945 (37.3) 5563 (35.3) 9550 (41.0) 15 113 (38.7)
 40-49 4468 (18.6) 3130 (19.9) 5697 (24.5) 8827 (22.6)
 50-59 1705 (7.1) 1357 (8.6) 1962 (8.4) 3319 (8.5)
 ≥60 492 (2.1) 427 (2.7) 485 (2.1) 912 (2.3)
 Unknown 846 (3.5) 544 (3.5) 388 (1.7) 932 (2.4)
Expedition number†
 1 16 976 (70.8) 11 055 (70.2) 12 365 (53.1) 23 420 (60.0)
 2-4 5817 (24.2) 3628 (23.1) 7735 (33.2) 11 363 (29.1)
 5-9 921 (3.8) 752 (4.8) 2246 (9.6) 2998 (7.7)
 ≥10 249 (1.0) 291 (1.9) 934 (4.0) 1225 (3.1)
 Unknown 32 (0.1) 17 (0.1) 15 (0.1) 32 (0.1)
Total 23 995 15 743 23 295 39 038

*Age at Himalayan debut for climbers; age at time of expedition for climbs.

†Number of career expeditions for climbers; sequence of the current expedition for climbs.