I've taken the liberty of putting together a combined population of "Silver Riders," graded AU-50 and higher by
NGC and
PCGS. I did simplify the numbers a bit, I did not include Pieforts, off-metal strikes, and I combined any privy marks (Rooster, Ship) and cabled/flower edge.
In all, there are 353 total graded AU-50 and higher. In MS, there are 170. Only 15 total MS-65 and MS-66, none higher.
Total by Province:
Gelderland - 17
Holland - 27
Overyssel - 19
Utrecht - 217
West Friesland - 42
Zeeland - 31
The forum won't allow me to upload the entire report, but following these directions will allow you to do so.
Copy all of the following and paste into a simple text editor, like notepad or wordpad. Save and change the file extension to .csv (comma separated values). The .csv file can be opened with Excel.

Date,Province,50,53,55,58,60,61,62,63,64,65,66,Total
1733,Gelderland,,1,,,,,,,,,,1
1734,Gelderland,,,,1,,1,,,,,,2
1767,Gelderland,2,,,2,,,,,,,,4
1774,Gelderland,1,,,1,,,1,,,,,3
1790,Gelderland,,,,1,,,,,,,,1
1792,Gelderland,1,4,,,,,,,1,,,6
1734,Holland,,,1,,,,,,,,,1
1754,Holland,,,,,,,,,1,,,1
1756,Holland,,1,,,,,,,,1,,2
1758,Holland,1,,,,,,1,,,,,2
1760,Holland,,,1,,,,,,,,,1
1765,Holland,,,,,,,,1,,,,1
1766,Holland,,1,,,,,,,,,,1
1767,Holland,1,,1,,,,,,,,,2
1771,Holland,1,,,,,,,,,,,1
1773,Holland,,,1,,,,,,,,,1
1774,Holland,,1,,,,,,,,,,1
1775,Holland,,,,,,,1,,,,,1
1779,Holland,,,,,,,1,,,,,1
1788,Holland,,,,1,,,,,,,,1
1789,Holland,2,,1,,,,,,,,,3
1791,Holland,,,,2,,1,1,,,,,4
1792,Holland,,,1,1,,,,,,,,2
1793,Holland,,,,,,,,,,,1,1
1733,Overyssel,,,2,1,,,1,1,,,,5
1734,Overyssel,1,,1,2,,4,1,1,,,,10
1736,Overyssel,,,,2,,,,,,,,2
1741,Overyssel,,,1,,,,,,,,,1
1764,Overyssel,,,,1,,,,,,,,1
1733,Utrecht,,1,,,,,,,,,,1
1739,Utrecht,,,,1,,,1,,3,,,5
1740,Utrecht,,,,1,,,,,,,,1
1741,Utrecht,,,1,1,,,1,,,,,3
1744,Utrecht,,,,1,,,,,,,,1
1745,Utrecht,,,1,,,,,,,,,1
1746,Utrecht,,,,,,1,,,1,,,2
1747,Utrecht,,,,2,,,,1,,,,3
1749,Utrecht,,,,,,,,1,,,,1
1755,Utrecht,,,,1,,,,,,,,1
1758,Utrecht,,,,,,,,,1,,,1
1759,Utrecht,,,,1,,,,1,,,,2
1760,Utrecht,,,,3,,,2,1,1,,,7
1761,Utrecht,,,1,,,2,,,2,2,,7
1762,Utrecht,2,,2,,,,,1,,,,5
1763,Utrecht,,,2,3,,,1,1,,,,7
1764,Utrecht,,,,,,,,,,1,,1
1765,Utrecht,,,1,,,,1,,1,,,3
1766,Utrecht,,,,,,,1,,,,,1
1767,Utrecht,,,,,,,,1,,,,1
1768,Utrecht,1,,1,,,,1,,,,,3
1769,Utrecht,,,1,1,,,,,1,,,3
1770,Utrecht,,,,1,,,,,,,,1
1771,Utrecht,,,2,1,,,,,,,,3
1774,Utrecht,,,,,,,,1,1,,,2
1776,Utrecht,,,,1,,,,,,,,1
1778,Utrecht,,,,,,,,1,,,,1
1779,Utrecht,,,,1,,,,,,,,1
1780,Utrecht,,,1,,,,1,,,,,2
1781,Utrecht,,,,1,,,1,,1,1,,4
1782,Utrecht,,,,2,,1,,,,,,3
1784,Utrecht,,,6,2,,,1,2,1,,,12
1785,Utrecht,1,,1,1,,1,,1,1,2,,8
1786,Utrecht,,1,,1,,,1,2,2,1,1,9
1787,Utrecht,,,,1,,,2,1,1,,,5
1788,Utrecht,,,1,1,,1,1,1,,,,5
1789,Utrecht,,,2,,,,3,1,,,,6
1790,Utrecht,2,4,4,5,,,2,3,1,,,21
1791,Utrecht,2,5,2,7,,2,6,3,1,,,28
1792,Utrecht,,1,,,,,1,5,1,,1,9
1793,Utrecht,,,3,2,,,2,4,,,,11
1794,Utrecht,,,2,,,,1,6,2,1,2,14
1748/7,Utrecht,,,,,,,1,,,,,1
1757/5,Utrecht,,,1,,,,,,,,,1
1757/6,Utrecht,,,,,,,1,,,,,1
1765/3,Utrecht,,,,,,,1,1,1,,,3
1781/0,Utrecht,,,1,2,,,,2,,,,5
1759,West Friesland,,1,,1,,,,,,,,2
1760,West Friesland,1,,2,1,,,,1,,,,5
1761,West Friesland,,,,1,,,,,,,,1
1766,West Friesland,,,,,,,,1,,,,1
1775,West Friesland,,,1,,,,,,,,,1
1780,West Friesland,1,,,,,,,,,,,1
1782,West Friesland,1,1,2,,,,,,,,,4
1785,West Friesland,,,3,,,,2,3,,,,8
1789,West Friesland,,,1,,,,,,,,,1
1792,West Friesland,,,1,1,,,1,,,,,3
1793,West Friesland,,,,,,,1,,,,,1
1755/4,West Friesland,,,,,,,1,,,,,1
1778/86,West Friesland,,,,,,,1,,,,,1
1791/0,West Friesland,,,1,2,,,1,2,,,,6
1793/2,West Friesland,1,,1,1,,2,1,,,,,6
1753,Zeeland,,,,,,1,,,,,,1
1755,Zeeland,1,,,,,,,,,,,1
1758,Zeeland,,,1,,,1,,,,,,2
1762,Zeeland,,,2,1,,,,,,1,,4
1767,Zeeland,1,1,,,,,,,,,,2
1771,Zeeland,,,,1,,1,2,,,,,4
1772,Zeeland,,,,,,1,,,,,,1
1774,Zeeland,,,1,,,1,,,,,,2
1785,Zeeland,,,,,1,1,,,,,,2
1790,Zeeland,,,,,,1,,,,,,1
1791,Zeeland,,,,1,,,1,,,,,2
1792,Zeeland,1,1,,,,,,,,,,2
1793,Zeeland,,,,,,1,,,,,,1
1785/76,Zeeland,1,,,1,,,,,,,,2
1792/1,Zeeland,,,1,,,,1,,2,,,4
,,26,24,63,70,1,24,52,51,27,10,5,353