Hello and welcome to another edition of The Crunch!
Just a note – we’re going to be sending this out on Fridays (Australian time) for a while.
In this week’s newsletter we have charts on… how likely it is people in the same job will marry each other, how common your PIN is, the history and frequency of school shootings in the US, a visual explainer on how flammable cladding fuelled an apartment fire in Spain, a round-up of US presidential debate-related charts, and a daily guess-the-chart game!
But first … how do home ownership rates compare?
In Australia, the housing and rental crisis rolls on. But how does Australia compare to other countries in terms of home ownership, and when did the home ownership rate start declining?
Josh has produced this analysis for The Crunch comparing home ownership rates across OECD countries from the 1920s onwards, as well as a look at ownership rates in Australia by age group and birth-year cohort. Read it here.
Four charts from the fortnight
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1. More than 383,000 US students have experienced gun violence at school since the Columbine shootings
The Washington Post has compiled a database of school shootings to track school violence since the Columbine High School shooting in 1999. They used this data to produce a timeline, which shows a dot for every 20 students exposed to violence:
The rest of the investigation has more charts and analysis which shows school shootings disproportionately affect Black children. You can read it here.
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2. How often do people in the same line of work end up married to each other?
The answer is very often if you’re a farmer or caravan park manager. The ABC has mined Australian census data to produce this fascinating look at marriage (including de facto relationships) between people from the same and different jobs.
According to the ABC, in 38% of more than 470 jobs held by working couples, the top choice of partner was someone in the same job. Here’s my favourite chart from the piece, a matrix heatmap which shows reddish-pink for more common job pairings and blue for less common:
There’s heaps of interesting charts in there, including an interactive calculator that tells you how ‘unique your love story’ is. Read more here.
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3. Buildings wrapped in solid petrol
Reuters has produced this excellent visual explainer on how flammable cladding, like that responsible for the Grenfell Tower disaster, remains on buildings worldwide.
Panels containing polyethylene are banned today in at least seven countries, according to Reuters, but few countries are actively replacing it. Fires involving the flammable cladding change the behaviour of building fires and the strategies for dealing with them. Read more here.
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4. How common is your PIN?
If it’s 1234 please reply to thecrunch@theguardian.com with your bank account details. Professor Jo Wood has produced this chart looking at the most common PINs based on the first and second digit pairs, using data from leaked authentication databases:
The format of the chart is based on work from Nick Berry and was subsequently redrawn by InformationIsBeautiful, according to Wood. The interactive version of the chart is great as it lets you find specific interesting PIN trends and also to see how common your own PIN is. Check it out here.
Spotlight on… US politics (again)
Google trends has a real-time issue tracker to see what people were googling during the presidential debate. The data is still being updated, so now it shows whatever the current trends are. But the picture during the debate was quite interesting.
An alternative look at the Harris-Trump debate, in five charts
Off the Charts
Can you guess what this chart is showing? It could be:
a) Annual video game console sales (thousands) for Sony (blue) and Nintendo (purple)
b) Operable nuclear power capacity (MWe) in Japan (blue) and China (purple)
c) Number of international tourists (thousands) visiting Vietnam (blue) and Thailand (purple)
d) Cumulative number of patents filed by Samsung (blue) and Huawei (purple)
e) Annual production of electric vehicles (hundreds) by Toyota (blue) and Tesla (purple)
If you think you know the answer, go here to check. This is a new daily game where you’re given a chart without the context and then quizzed on what it might be showing. Find the latest game here. We found this via Datawrapper’s Data Viz Dispatch newsletter.
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