Two 7.4% publications were identified until 1990, 7 25.9% between 1991 and 2000 and 18 66.7% between 2001 and 2007.
Hasta 1990 hubo 2 7,4% publicaciones, de 1991 a 2000 hubo 7 25,9% y de 2001 a 2007, 18 66,7%.
Até 1990 houve 2 7,4% publicações, de 1991 a 2000 houve 7 25,9% e de 2001 a 2007, 18 66,7%.