Add year/proof lines to Netherlands 2 1/2 Gulden [solved]

Could the following year lines be added, to this 2,5 gulden coin https://en.numista.com/catalogue/pieces736.html?
I have a coin I higly suspect to be the proof, from the year 1971, but not sure yet though (asked here: https://en.numista.com/forum/topic108284.html).

I don't know about the minmarks, but I dare to think they are rooster on all.

Thank you
- Jamtrup

Year: Mintage: Comment
1971, 500 Cock; Proof
1972, 500 Proof
1973, 500 Proof
1974, 500 Proof
1975, 500 Proof1976, 500 Proof
1977, 500 Proof
1978, 500 Proof
1979, 500 Proof
1980, 500 Proof

Source:
https://www.ngccoin.com/price-guide/world/netherlands-2-1-2-gulden-km-191-1969-1980-cuid-1083442-duid-1458754

I'm sorry Jamtrup, the downvote is mine but it was premature. I downvoted because your coin isn't a proof (see reaction on your question here: https://en.numista.com/forum/topic108284.html). But of course, your coin not being a proof doesn't mean proof coins don't exists because they do:



For all the ones you requested the mint mark is a cock, except for 1980 where the mint mark is a cock and star (the star means the new mintmaster had not chosen his own mark yet).

The thousandth example why this "The list of years is complete and has been verified. Most requests to add new year entries are sent for the wrong coin type. If you are sure you own this coin with a date that is not listed here, you can ask to have it added through the forum and include a picture of your coin in your message." shouldn't be in our catalog. A simple change request will much quicker correct these shortcomings in our catalog. And it's not so demotivating as making a forum post about it.

Better late than never. Added.