Harper’s Index,
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Percentage of pending cases at the European Court of Human Rights that were filed against the Russian government : 19

That were filed against the UK government : 0.5

Portion of Americans who believe another world war is likely : 2/3

Percentage of Americans who say they would be “not at all” willing to volunteer to fight in another world war : 42

Who say they would be “very” or “somewhat” willing : 31

Number of the ten deadliest heat waves in recorded history that have
occurred since 2000 : 9

Estimated percentage chance that the UN’s “worst-case scenario” for
global warming is too optimistic : 35

Factor by which more energy is required to mine a dollar’s worth of bitcoin than a dollar’s worth of copper : 4.25

Year in which Alberta, Canada, launched a campaign to eliminate its breeding populations of rats : 1950

Estimated number of times a rat is spotted there each year : 24

Percentage of Americans who, when asked, say that caring for animals gives
their lives a “great deal” of meaning : 45

Who mention pets or animals as a source of meaning without being prompted : 5

Year by which a Norwegian company aims to use dead fish to help
power cruise ships : 2021

Estimated portion of Norwegians who regularly play chess online : 1/10

Who watched the World Chess Championship in November : 3/5

Percentage of soccer fans who have witnessed racial abuse during a match : 54

Percentage of soccer fans who would be comfortable having a player of a different race or ethnicity on their favorite team : 84

Of Saudi Arabian soccer fans : 11

Rank of flag football among the fastest-growing US team sports from 2016 to 2017 : 1

Percentage by which more US children aged 6 to 12 play flag football
than play tackle football : 12

Percentage of US college graduates whose first jobs do not typically require a college degree : 43

Of college graduates whose jobs five years after graduation do not typically
require a college degree : 35

Percentage change in the number of US homeless from 2010 to 2017 : -13

In the number of homeless in the ten most expensive US cities : +31

Percentage of Americans who say they are still paying off debt
from the 2017 holiday season : 15

Average value of labor that US employees annually donate to their employers by
not taking vacation days : $561

Average number of state and local tax breaks of $50 million or more awarded to corporations annually since 2010 : 22

Time at which Arkansas shuts down the website on which Medicaid recipients must report their work hours : 9:00 pm

Number of states with lower rates of internet access than Arkansas : 0

Average number of photographs and videos that English parents post online of their children by age 13 : 1,300

Percentage increase in US households without paid television
subscriptions since 2015 : 30

Minimum percentage of the teen birth-rate decline from 1999 to 2007 attributable to broadband internet access : 7

Percentage of 18- to 29-year-old social-media users who say it’s acceptable for their data to be used to personalize ads : 54

Who say it’s acceptable for their data to be used to show them messages
from political campaigns : 35

Percentage decrease last year in Facebook employees who are
optimistic about the company’s future : 38

In employees who believe the company is
making the world better : 26

Percentage increase in the number of job postings with the title
“Rock Star” since 2014 : 205

With the title “Ninja” : 453

Number of degrees since 1999 by which the Leaning Tower of Pisa
has straightened : 0.55

1, 2 European Court of Human Rights (Strasbourg, France)
3–5 YouGov (NYC)
6 Debarati Guha, Catholic University of Louvain (Brussels)
7 Peter Christensen, University of Illinois at Urbana-Champaign
8 Oak Ridge Institute for Science and Education (Cincinnati)
9, 10 Alberta Ministry of Agriculture and Forestry (Edmonton, Canada)
11, 12 Pew Research Center (Washington)
13 Hill+Knowlton Strategies (Miami)
14 Norwegian Chess Federation (Oslo)
15 Norwegian Broadcasting Corporation (Oslo)
16–18 Kick It Out (London)
19, 20 Sports & Fitness Industry Association (Silver Spring, Md.)
21, 22 Burning Glass Technologies (Boston)
23, 24 US Department of Housing and Urban Development
25 YouGov
26 US Travel Association (Washington)
27 Good Jobs First (Washington)
28 Arkansas Department of Human Services (Little Rock)
29 US Department of Education
30 Office of the Children’s Commissioner for England (London)
31 UBS (NYC)
32 Melanie Guldi, University of Central Florida (Orlando)
33, 34 Pew Research Center
35, 36 Facebook (Menlo Park, Calif.)
37, 38 Indeed (Austin, Tex.)
39 Nunziante Squeglia, University of Pisa (Italy)