Distinct Nationalities per Year
Number of different climbing nationalities present on Himalayan expeditions each year, and the subset of those nationalities that achieved at least one summit. A handful of countries in the 1950s, well over fifty by the 2010s.
| Year | Nationalities | Summit Nationalities | Total Summits |
|---|---|---|---|
| 1905 | 4 | 0 | 0 |
| 1907 | 1 | 0 | 0 |
| 1909 | 1 | 1 | 1 |
| 1910 | 1 | 1 | 1 |
| 1920 | 1 | 0 | 0 |
| 1921 | 4 | 0 | 0 |
| 1922 | 3 | 0 | 0 |
| 1924 | 2 | 0 | 0 |
| 1925 | 1 | 0 | 0 |
| 1929 | 5 | 0 | 0 |
| 1930 | 5 | 5 | 13 |
| 1931 | 3 | 0 | 0 |
| 1933 | 3 | 0 | 0 |
| 1934 | 2 | 0 | 0 |
| 1935 | 5 | 2 | 3 |
| 1936 | 4 | 2 | 5 |
| 1937 | 5 | 0 | 0 |
| 1938 | 3 | 0 | 0 |
| 1939 | 4 | 2 | 9 |
| 1940 | 1 | 0 | 0 |
| 1947 | 4 | 0 | 0 |
| 1949 | 5 | 4 | 18 |
| 1950 | 5 | 1 | 2 |
| 1951 | 5 | 0 | 0 |
| 1952 | 8 | 4 | 13 |
| 1953 | 7 | 5 | 43 |
| 1954 | 12 | 6 | 43 |
| 1955 | 12 | 8 | 53 |
| 1956 | 6 | 5 | 17 |
| 1957 | 3 | 1 | 4 |
| 1958 | 10 | 4 | 6 |
| 1959 | 9 | 4 | 13 |
| 1960 | 13 | 10 | 48 |
| 1961 | 9 | 6 | 24 |
| 1962 | 11 | 8 | 78 |
| 1963 | 11 | 7 | 43 |
| 1964 | 13 | 9 | 57 |
| 1965 | 8 | 6 | 36 |
| 1966 | 5 | 0 | 0 |
| 1967 | 4 | 2 | 4 |
| 1968 | 2 | 2 | 3 |
| 1969 | 11 | 5 | 23 |
| 1970 | 10 | 7 | 66 |
| 1971 | 16 | 7 | 29 |
| 1972 | 14 | 7 | 54 |
| 1973 | 13 | 7 | 47 |
| 1974 | 17 | 10 | 78 |
| 1975 | 15 | 10 | 79 |
| 1976 | 17 | 11 | 68 |
| 1977 | 16 | 11 | 33 |
| 1978 | 17 | 12 | 154 |
| 1979 | 20 | 13 | 193 |
| 1980 | 19 | 15 | 167 |
| 1981 | 24 | 19 | 193 |
| 1982 | 23 | 21 | 292 |
| 1983 | 23 | 19 | 192 |
| 1984 | 23 | 18 | 253 |
| 1985 | 30 | 22 | 250 |
| 1986 | 28 | 17 | 189 |
| 1987 | 33 | 18 | 175 |
| 1988 | 33 | 24 | 247 |
| 1989 | 35 | 26 | 267 |
| 1990 | 32 | 30 | 312 |
| 1991 | 38 | 30 | 307 |
| 1992 | 44 | 31 | 312 |
| 1993 | 41 | 31 | 394 |
| 1994 | 45 | 30 | 375 |
| 1995 | 48 | 37 | 455 |
| 1996 | 51 | 39 | 494 |
| 1997 | 54 | 38 | 423 |
| 1998 | 54 | 43 | 574 |
| 1999 | 51 | 41 | 485 |
| 2000 | 49 | 34 | 564 |
| 2001 | 54 | 39 | 544 |
| 2002 | 52 | 40 | 663 |
| 2003 | 59 | 48 | 846 |
| 2004 | 56 | 47 | 1024 |
| 2005 | 62 | 53 | 860 |
| 2006 | 64 | 53 | 1249 |
| 2007 | 70 | 59 | 1161 |
| 2008 | 75 | 57 | 1103 |
| 2009 | 77 | 61 | 1278 |
| 2010 | 81 | 60 | 1062 |
| 2011 | 92 | 73 | 1388 |
| 2012 | 80 | 63 | 1175 |
| 2013 | 89 | 64 | 1317 |
| 2014 | 78 | 52 | 808 |
| 2015 | 87 | 38 | 371 |
| 2016 | 75 | 61 | 1362 |
| 2017 | 79 | 62 | 1657 |
| 2018 | 84 | 66 | 1864 |
| 2019 | 103 | 81 | 2150 |
| 2020 | 28 | 19 | 193 |
| 2021 | 106 | 70 | 1048 |
| 2022 | 100 | 85 | 1936 |
| 2023 | 113 | 102 | 2356 |
| 2024 | 105 | 88 | 2525 |
| 2025 | 89 | 69 | 1279 |