The Himalaya by the Numbers: A Statistical Analysis - Himalayan ...

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Chart A-18: Member ascent rates by expedition year for commercial (S Col and N Col)
and non-commercial routes on Everest from 1970-2006
Ascents by Age Groups
Table and Chart A-19 show member ascent counts and rates by age groups in 5-year
intervals. The table is divided into three sections: all peaks and routes from 1950 to
1989, all peaks and routes from 1990 to 2006, and all peaks and routes from 1990 to
2006 excluding the commercial routes on Ama Dablam, Cho Oyu, and Everest.
Age
Groups
Commercial vs. Non-Commercial Member Ascent Rates for Everest
(1970-2006)
1970-1974 1975-1979 1980-1984 1985-1989 1990-1994 1995-1999 2000-2004 2005-2006
1950-1989 All Peaks
with All Routes
Commercial Rtes Non-Commercial Rtes
1990-2006 All Peaks
with All Routes
1990-2006 All Peaks
and Routes excluding
Ama Dablam-Cho Oyu-
Everest Commercial Rtes
Above Ascent Ascent Above Ascent Ascent Above Ascent Ascent
BC Cnt Rate BC Cnt Rate BC Cnt Rate
Unknown 1156 174 15.1 384 79 20.6 221 49 22.2
10-14 1 0 0.0 4 0 0.0 1 0 0.0
15-19 45 7 15.6 85 46 54.1 42 20 47.6
20-24 1304 269 20.6 1106 341 30.8 618 129 20.9
25-29 3569 830 23.3 3235 1067 33.0 1736 418 24.1
30-34 3054 670 21.9 4499 1537 34.2 2145 509 23.7
35-39 1989 396 19.9 4181 1467 35.1 1875 468 25.0
40-44 1122 211 18.8 3353 1128 33.6 1469 356 24.2
45-49 521 94 18.0 2216 676 30.5 943 228 24.2
50-54 258 25 9.7 1367 399 29.2 536 113 21.1
55-59 107 8 7.5 756 184 24.3 323 62 19.2
60-64 39 3 7.7 374 92 24.6 156 20 12.8
65-69 14 0 0.0 125 32 25.6 62 13 21.0
70-74 3 0 0.0 43 8 18.6 19 4 21.1
75-79 2 1 50.0 8 2 25.0 5 2 40.0
Table A-19: Member ascents by age groups
Ascent Analysis 55