Jara, also known as Jera, is a Nigerian language reported to be spoken by 46,000 people in 2000. It is spoken in Borno and Gombe States, in the Biu, Kwaya-Kusar, Akko, and Yamaltu-Deba LGAs. It is an Afro-Asiatic language, in the Biu–Mandara branch of Chadic family. Use of Jara is declining; it is being displaced by Fulfulde and Hausa.
Jara is spoken by less than 46000 people today.
The statement is definitely correct because the excerpt states that the number of people using Jara in 2000 was about 46000, and that the use of the language has declined. Therefore there must be less people using it today. The system may have had difficulty due to no specific number being given for today.