How to say in that year 2000 Which of this following  expressions is right if i want to say that year 2000. Besides is necessary a , in any of both expressions.

2000年那年   or   2000 那年

It is supposed to be used in sentences such as “2000年那年，姚明获得了成功。” or “2000那年，姚明获得了成功。”
2000年那年，姚明获得了成功。√
2000那年，姚明获得了成功。×