Ivory (masculine) | Ivory (feminine) | |||||
Year | Rank | Percent Used | Rank | Percent Used | ||
2020 | - | - | #550 | 0.031 | ||
2010 | - | - | #794 | 0.018 | ||
2000 | - | - | #1569 | 0.007 | ||
1990 | #1858 | 0.002 | #1421 | 0.006 | ||
1980 | #1154 | 0.004 | #1192 | 0.007 | ||
1970 | #997 | 0.004 | - | - | ||
1960 | #789 | 0.005 | #1966 | 0.002 | ||
1950 | #604 | 0.007 | #1419 | 0.003 | ||
1940 | #651 | 0.006 | #1140 | 0.004 | ||
1930 | #697 | 0.007 | #1062 | 0.004 | ||
1920 | #715 | 0.007 | #1040 | 0.004 | ||
1910 | #714 | 0.008 | #955 | 0.005 | ||
1900 | #521 | 0.013 | #864 | 0.006 | ||
1890 | #718 | 0.007 | #1014 | 0.004 | ||
1880 | #753 | 0.006 | #1345 | 0.001 | ||