That is a very good rate. If you are new to this, that is a successful result of what you are doing. Its like going to the gym. If you go to the gym for the first time, with professional coach as every single individual should in order to achieve results, is not uncommon to see 10 pounds of muscle the first year. But that doesnt mean you will gain 10 pounds every single year for 10 years. That would equal 100 pounds of muscle which is impossible for the creation.
You will keep gaining, eventually will get harder and harder at which point you need to asses your structural composition and apply different techniques. Meanwhile, the worst you can do is change what you are doing. If you saw this type of result, what to do next is very simple: The same you have been doing, until it provides no more satisfactory results.
Period 1: 06/08/2020 BPFSL: 22cm (8.66") BPEL: 22cm (8.66") EG: 15.8cm (6.25") => 09/07/2020 BPFSL: 23.9cm (9.40")
Period 2: 05/01/2021 BPFSL: 24cm (9.44") BPEL: 22cm (8.66") EG: 15.8cm (6.25") => 07/24/2021 BPFSL: 25.4cm (10.00") BPEL: 23.5cm (9.25")
Goal: 1 Foot x 7.5 Inches (30.48cm x 19.05cm) NBPEL