Counting marmots…
Time periods covering everything in the Knowledge Commons. Open an era to see what was happening then; the per-era views let you compare patterns of research, policy, and reporting across decades.
11 eras (decades only)
Five-year window: 2021–2025.
Five-year window: 2016–2020.
Five-year window: 2011–2015.
Five-year window: 2006–2010.
Five-year window: 2001–2005.
Five-year window: 1996–2000.
Five-year window: 1991–1995.
The 1980s, extended through 1990 to absorb the year that fell between the 1989 boundary and the 1991-start of the 5-year buckets. Mild asymmetry (11 years instead of 10) but avoids losing any 1990 records.
The 1970s. Sample sizes are large enough individually here to stand alone, unlike the combined 1950s–60s bucket.
Combined 1950s and 1960s. Per-decade samples are too thin individually to support stable diversity estimates, so they are merged here.
Early 20th-century activity in the Gunnison Basin. A single bucket because per-decade sample sizes before 1950 are too thin for stable comparison (~270 publications spread across five decades).