This is the 457th most frequent Russian word.
показатель
Indicator; metric; parameter; index.
In this sentence, 'показатель' refers to a measurable value or parameter that marks a statistical or situational state, in this case, related to the economy.
Экономический показатель страны вырос за последний год.
The economic indicator of the country has increased over the last year.
Here, 'показатель' is used metaphorically to denote something that signifies or reflects a particular trend or standard.
Этот учебник — показатель нового подхода к обучению.
This textbook is an indicator of a new approach to education.
In this context, 'показатель' is used as a sign or symptom that reveals the existence of a condition or phenomenon.