World Rugby ranking position of the women's national team in Italy 2010-2020

Regarding the methodology of the ranking the source specifies: "Both Men's and Women's World Rugby Rankings are calculated using a 'Points Exchange' system, in which sides take points off each other based on the match result. Whatever one side gains, the other loses.

The exchanges are based on the match result, the relative strength of each team, and the margin of victory, and there is an allowance for home advantage.

[...]The women’s rankings differ from the men’s in the way that the starting ranking points are calculated:
The first official women’s full international match was played in 1987 and since then the number of women’s matches is considerably fewer than the number of men’s matches.
There are a number of women’s teams who do not play regular matches.
As a result of the relatively small number of matches compared to the men’s and the discrepancies in the number of matches played by different Unions the effect that one result will have on the rankings could unfairly skew the result.

To combat this effect, it has been decided to start all teams out on 80 ranking points (an arbitrarily chosen figure which does not have any bearing on the subsequent results of the rankings) in 1987, then for each year between 1987 and the year that an individual Union played their first women’s full international match 2 points are deducted from their total. This deduction occurs up until 2007, so if a team plays their first ever full international after 2007 then they will begin with 40 ranking points."