@dboehmer I wanted to keep the labels simple to reduce the amount of text, as it quickly becomes "heavy" otherwise. But yeah, I'll think of how to improve it.
a) write "2000 f." for 2000–2001 like common for giving page numbers in citations. (I just learned that "f." is for giving someone’s birthdate in Swedish 😁 ) https://en.wiktionary.org/wiki/f.#Adjective
b) Use "≤" or "≥" mathematical operators. As the key is most probably read from the top to the bottom maybe give the lower number year instead like - ≥ 2023 - ≥ 2021 - ≥ 2019 - … - < 2000
@bagder Really the best visualization of this dataset so far!
I find it confusing that only even years like 2000, 2002, etc. are listed. Did you skip every 2nd year? If data for each two years is accumulated please write "2000-2001" in the key.