“更高评级等级数量”（Population in Higher Grades）反映了NGC统计数量报告中，（相较于某枚币）处于更高数值评级等级及拥有更好的铸造特征的硬币数量。例如，对于一枚评级为MS 67 BN硬币来说，“更高评级等级数量”反映的即为评级等级为 MS 67 RB和MS 67 RD的硬币数量（因为相较于“BN”而言，“RB”和“RD”是更好的铸造特征。），以及拥有更高数值评级等级硬币的数量。同样，如果一枚硬币的评级为MS 70 PL，那么“更高评级等级数量”则将反映评级为MS 70 DPL硬币（如有）的数量。

Disclaimer: The prices listed in the various NGC Price and Value Guides are compiled from a number of independent, third party sources in the numismatic community which NGC believes to be reliable. The NGC Price Guide value shows the average dealer retail price for an NGC-certified coin in a standard holder with a standard label, not specific prices for individual coins and does not reflect any premiums for special holders, labels or designations. Further, because these prices are only updated from time to time, they do not reflect short term pricing trends, which are quite common and are often quite dramatic, given the volatile nature of the collectible coin marketplace. This is especially true for rare coins, where there are fewer sales and greater variations in sale prices. For all of these reasons, the prices in these guides are designed to serve merely as one of many measures and factors that coin buyers and sellers can use in determining coin values. These prices are not intended, and should not be relied upon, to replace the due diligence and — when appropriate — expert consultation that coin buyers and sellers should undertake when entering into a coin transaction. As such, NGC disclaims all warranties, express or implied, with respect to the information contained in the NGC Guides. By using the NGC Guides, the user agrees that neither NGC nor any of its affiliates, shareholders, officers, employees or agents shall have any liability for any loss or damage of any kind, including without limitation any loss arising from reliance on the information contained in the Guides.

某个特定评级等级下的硬币数量反映了相应评级等级、标识(例如“+”或早期发行)和品相专称(例如“BN”或“Ultra Cameo”)下，经NGC评级的硬币数量。“获得更高评级等级”的数量反映了经NGC评级后，比该枚硬币所获等级更高和/或标识和品相专称更好的硬币数量。如果硬币的标签上带有签名(例如Mercanti的签名)，那么硬币数量将限于带有这个签名的硬币数量。

例如，如果一枚硬币的等级是NGC AU 58 BN，则显示的数量将为所有等级为NGC AU 58 BN的硬币数量。“获得更高评级等级”的数量将包括评级等级为NGC AU 58 RB、NGC AU 58 RD、NGC AU 60 BN等的硬币数量。

有关NGC评级标准、标识和品相专称的信息，请点击这里。