Battery life

Apple has mentioned battery cycle limit for MacBook Air and it is 1000 after that it tends to decrease in battery capacity. Here you have now 90% battery capacity so it depend on your way of using it . Here's a link that will help you

Determine battery cycle count for Mac laptops - Apple Support (IN)

It looks normal. Here are a few tips to Make a Laptop Battery Last Longer

• • Keep Brightness Low
  • Turn on Power Saver Mode
  • Close Unnecessary Apps and Processes
  • Update Your OS and Applications
  • Keep Ventilation and Fans Clean
  • Balance Your Battery Charging
  • Unplug Unused Peripheral Devices
  • Check Battery Reports

Cycle count is eye candy and not really of much productive use.

The critical metric is remaining capacity and 90% is pretty good. No two batteries are alike and comparing one to another is fruitless.

You have no problems.

1000 is not a limit, it's Apple's benchmark for the expected usual and customary life of a battery. The 1000 can be exceeded with no ill effects as it's just a count of 100% charge cycles. If the battery is still functioning as expected at 1000 cycles, still takes a charge and still has remaining capacity above 80% you can continue safely using the battery.