Population data isn't always a good indicator of true rarity. Often times a coins rarity gets publicized which increases its popularity and in turn its population data. If a coin is popular or thought to be rare, people seek it out which causes dealers to seek it out and brings more of the coins to market either from sellers that are happy with the higher price or sellers / dealers in China or other parts of the world. The 98 & 95s are examples of this.
Also, for example the 1982 may not be the rarest coin but its rarity vs popularity ratio makes it a higher value coin. It is a first year release, always more buyers / collectors for those. Take a look at the 1983 Silver panda as an example of that. PF69's going for around 8,000 recently. I dare say the 1982 golds are as rare or moreso than the 1983 silver panda. ESPECIALLY a MS69 grade as the 82's are notorious for not grading well.