Do you add "在“ before saying "___年“？
You sentence is correct with or without the 在. Using 在 will put a bit more emphasis on the year, while leaving off 在 will put a bit more emphasis on the action. Also, if you're listing years, you would not use 在:

2006年，中国的物流系统非常糟糕。2008年，仍然糟糕