PDB Statistics: UniProtKB Entries with Known 3D Structure (Annual)
This chart shows the total number of unique UniProtKB entries in PDB structures released within each year.
Note: The number of unique UniProtKB entries in the statistics table is linked to the group search result page. There is a default precision threshold in calculating the numbers for performance balance. So the statistics count may have a slight discrepancy compared to the actual non-redundant group search result when the result count approaches or goes above 10,000. The group search result page provides an accurate count. The statistics page provides the trend.
| Year | UniProtKB Entries with Known 3D Structure |
|---|---|
| 1976 | 11 |
| 1977 | 12 |
| 1978 | 3 |
| 1979 | 8 |
| 1980 | 7 |
| 1981 | 10 |
| 1982 | 24 |
| 1983 | 18 |
| 1984 | 16 |
| 1985 | 18 |
| 1986 | 9 |
| 1987 | 14 |
| 1988 | 41 |
| 1989 | 55 |
| 1990 | 79 |
| 1991 | 104 |
| 1992 | 100 |
| 1993 | 354 |
| 1994 | 702 |
| 1995 | 569 |
| 1996 | 657 |
| 1997 | 976 |
| 1998 | 1,266 |
| 1999 | 1,552 |
| 2000 | 1,702 |
| 2001 | 1,897 |
| 2002 | 2,071 |
| 2003 | 2,787 |
| 2004 | 3,478 |
| 2005 | 3,800 |
| 2006 | 4,288 |
| 2007 | 4,743 |
| 2008 | 4,804 |
| 2009 | 4,777 |
| 2010 | 5,013 |
| 2011 | 4,774 |
| 2012 | 5,221 |
| 2013 | 5,577 |
| 2014 | 6,663 |
| 2015 | 6,426 |
| 2016 | 7,272 |
| 2017 | 7,812 |
| 2018 | 7,976 |
| 2019 | 8,444 |
| 2020 | 10,002 |
| 2021 | 9,326 |
| 2022 | 10,992 |
| 2023 | 11,666 |
| 2024 | 12,069 |
| 2025 | 13,127 |
| 2026 | 4,332 |














