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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1945 3
1946 55
1947 48
1948 40
1949 51
1950 74
1951 85
1952 115
1953 106
1954 125
1955 110
1956 94
1957 99
1958 95
1959 98
1960 90
1961 95
1962 107
1963 84
1964 70
1965 50
1966 5
1967 2
1968 2
1969 5
1970 2
1971 4
1972 2
1973 5
1974 6
1975 30
1976 39
1977 123
1978 321
1979 395
1980 442
1981 472
1982 470
1983 538
1984 527
1985 639
1986 534
1987 603
1988 792
1989 922
1990 1213
1991 1426
1992 1705
1993 1790
1994 2058
1995 2330
1996 2810
1997 3260
1998 3541
1999 4024
2000 4160
2001 4709
2002 4878
2003 5760
2004 6519
2005 6519
2006 7812
2007 8174
2008 7942
2009 7539
2010 7965
2011 8179
2012 9061
2013 8856
2014 9011
2015 8444
2016 8110
2017 8408
2018 9135
2019 9466
2020 8686
2021 6349
2022 4305
2023 4276
2024 7083
2025 5086

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Page 1
[What is health services research?].
van den Berg N, Hoffmann W. van den Berg N, et al. Schmerz. 2025 Feb;39(1):7-13. doi: 10.1007/s00482-024-00843-9. Epub 2024 Oct 15. Schmerz. 2025. PMID: 39407008 German.
[Memorandum Registry for Health Services Research: Update 2019].
Stausberg J, Maier B, Bestehorn K, Gothe H, Groene O, Jacke C, Jänicke M, Kostuj T, Mathes T, Niemeyer A, Olbrich K, Schmitt J, Neugebauer E. Stausberg J, et al. Gesundheitswesen. 2020 Mar;82(3):e39-e66. doi: 10.1055/a-1083-6417. Epub 2020 Feb 18. Gesundheitswesen. 2020. PMID: 32069507 Review. German.
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