The report also found a 1.26 per cent increase in the number of tests carried out globally last year in comparison with 2014 as well as a 1.1 per cent increase in the number of Adverse Analytical Findings (AAF).

A total of 32,362 football samples were analysed across WADA-approved laboratories.

This compares with 30,308 in athletics and 22,652 in cycling. 

Aquatics is next on the list with 12,973, followed by weightlifting with 10,262 and rugby union with 8,451.

All other sports on the Rio 2016 programme had registered less than 5,400 samples. 

Equestrian and golf are lowest with just 419 and 417 respectively.

The report only records AAF's where banned substances were found, rather than confirmed Anti-Doping Rule Violations (ADRV), and so not all of the cases recorded will have necessarily resulted in sanctions.

Of all the summer sports, weightlifting had the highest percentage of tests resulting in ADRV's, at 2.7, closely followed by golf with 2.4. 

In comparison, bodybuilding - which has just been added to the Pan American Games programme for Lima 2019 - produced 266 or 15 per cent ADRVs out of 1,787 tests conducted. 

Samples directly tested by International Federations are also mentioned in the report.

The International Cycling Union tested 7,818 samples in 2015.

The International Association of Athletics Federations was the second most prolific with 4,710 ahead of the International Tennis Federation, with 3,327, and World Rugby with 2,995.

A total of 2,161 samples were taken by the International Aquatics Federation, 1,756 by the International Weightlifting Federation and 1,255 by FIFA.

The International Ski Federation was the leading winter body with 1,583 in comparison with respective totals of just 67 and 57 by the World Curling Federation and International Luge Federation.

Sports added onto the Summer Olympic programme for Tokyo 2020 were also included.

There is no record, however, of any tests having been conducted in skateboarding, either by the International Skateboarding Federation or by the International Roller Sports Federation, the body due to organise events in the discipline at the Games in the Japanese capital.

No AAF have been recorded in modern pentathlon, luge or sport climbing.

In a press release accompanying the release of the report, WADA welcomed the slight increase in total testing figures from their 2014 figure. 

They found banned substances in 3,809 samples from 303,369 tests carried out globally last year as opposed to 3,153 from 283,304 samples in 2014.

Fifty per cent of these were for anabolic steroids.

WADA's 2015 Testing Figures Report marks the first set of global testing data since the 2015 World Anti-Doping Code came into effect at the start of last year.

A 7.1 per cent increase in the number of samples analysed from 283,304 samples in 2014 to 303,369 in 2015 was also highlighted along with a rise in the number of blood samples up from 4.78 per cent in 2014 to 6.98 in 2015.

“Alongside areas of activities such as education, investigations and information sharing, testing is a critical tool in anti-doping organisations’ (ADOs) commitment to working towards fair competition and clean sport,” said WADA President Sir Craig Reedie. 

“This 2015 Report represents figures from the first year under the enhanced Code that ADOs practice worldwide; and, interestingly, the findings highlight an increase in the number of samples analysed and an increase in the number of Adverse Analytical Findings reported."

The below table outlines the total number of samples taken in Summer and Winter Olympic sports as well as the total number and percentages of AAFs found.

* Skateboarding is recorded as a discipline of the International Roller Sports Federation. However, WADA have confirmed to insidethegames that there were no tests reported in 2015 under this discipline.

The full report can be found here