How many characters do Chinese pupils know at different ages? I'm looking for data that would let me estimate how much written language young Chinese at different ages know, in terms of number of characters they can read/write.

Examples of materials that would help answer this question:


lists of characters that Chinese pupils learn at different grades at school (ideally official lists, if there are any)
statistics of how many new characters they learn at each grade
information about how many hours at every grade are dedicated exclusively to learning characters


I'm interested in data from China and from other Chinese-speaking countries.
Children usually go to grade 1 at the age of 6 or 7 in China.

According to "全日制义务教育语文课程标准", the character number that children should learn is:

Grade 1 to Grade 2: can read 1600 characters, and write 800 characters;

Grade 3 to Grade 4: can read 2500 characters, and write 2000 characters;

Grade 5 to Grade 6: can read 3000 characters, and write 2500 characters;

Grade 7 to Grade 9: can read 3500 characters, and write 3000 characters.