## Quality and popularity formulas for the article
**Statistical Yearbook of Switzerland** ^{EN}

$$Quality=1/c∑↙{i=1}↖c nm_i-RS=1/6(15.08+0.85+15.38+57.14+5.8+4)$$

where:

- $nm_i$ is normalized quality metric $i$
- $c$ is the number of quality metrics
- $RS$ is the reducing score (if exists)

$$GlobalAI=|⋃↙{lang=1}↖4 Authors_{lang}|=$$

$$PopGlobal=∑↙{lang=1}↖4 PopLocal_{lang}=13$$

where:

- $lang$ is an index of language version
- $AI$ means Authors’ Interest (number of authors)
- $Pop$ means popularity of the article (number of page views)
- $Authors_{lang}$ is a set of unique names of the authors of article "Statistical Yearbook of Switzerland" in language $lang$ during September 2021
- $PopLocal_{lang}$ is a popularity of article "Statistical Yearbook of Switzerland" in language $lang$ in September 2021

The results of the calculations may be slightly different because of rounded values of normalized metrics in formulas