There's a few things to consider.
It could be that more young people are influenced, or it could be that some are more willing to seek out hormone therapy because of the way society views the issue. It could be pieces of both. The problem is that the numbers doesn't tell us anything about how many girls self-identity as another gender vs how many did in 97. It only tells us about how many go through hormone treatment, which is somewhat tied to legislation.
Either way it's a stark increase that needs to be looked into, especially to gauge how it reflects on the number of transpeople in reality and why these girls want to transition.
Seems like the Transgender rep mention in the article wants to get to the bottom of it as well:
"Stephanie Davies-Arai, of Transgender Trend, a group that questions the rise in the number of children identifying as transgender, said: “We need an inquiry into why there has been such an unprecedented increase in the number of teenage girls who are unhappy at being girls, and it should be understood within a context of adolescent girls’ mental health. In 2019 we are still waiting for news of Penny Mordaunt’s promised inquiry.”
You sound really educated on the subject! Not like an ignoramus projecting his stupidity at all. It's exactly the same thing, what a riveting story.
Did you read what YOU posted?
Even a tranny group doesn’t buy the results. “Adolescent girls MENTAL HEALTH”.
It’s exactly what I stated. Ugly unpopular girls seeking acceptance, gravitating to the group that will gain them the most sympathy.
But please, continue giving them the attention they desire, what could go wrong...
Oh that’s right, the suicide rate of trannies...