| $21 in Year | Value in 2026 |
| $21 in 1914 | $680.51 |
| $21 in 1915 | $673.78 |
| $21 in 1916 | $660.69 |
| $21 in 1917 | $586.65 |
| $21 in 1918 | $496.73 |
| $21 in 1919 | $412.43 |
| $21 in 1920 | $360.06 |
| $21 in 1921 | $350.78 |
| $21 in 1922 | $393.36 |
| $21 in 1923 | $402.67 |
| $21 in 1924 | $393.36 |
| $21 in 1925 | $393.36 |
| $21 in 1926 | $380.18 |
| $21 in 1927 | $384.47 |
| $21 in 1928 | $393.36 |
| $21 in 1929 | $397.96 |
| $21 in 1930 | $395.65 |
| $21 in 1931 | $422.68 |
| $21 in 1932 | $466.11 |
| $21 in 1933 | $519.48 |
| $21 in 1934 | $515.54 |
| $21 in 1935 | $507.85 |
| $21 in 1936 | $493.13 |
| $21 in 1937 | $486.08 |
| $21 in 1938 | $472.58 |
| $21 in 1939 | $486.08 |
| $21 in 1940 | $486.08 |
| $21 in 1941 | $482.63 |
| $21 in 1942 | $439.04 |
| $21 in 1943 | $402.67 |
| $21 in 1944 | $391.10 |
| $21 in 1945 | $382.31 |
| $21 in 1946 | $373.91 |
| $21 in 1947 | $316.52 |
| $21 in 1948 | $290.82 |
| $21 in 1949 | $282.37 |
| $21 in 1950 | $288.35 |
| $21 in 1951 | $272.21 |
| $21 in Year | Value in 2026 |
| $21 in 1952 | $256.80 |
| $21 in 1953 | $254.87 |
| $21 in 1954 | $252.98 |
| $21 in 1955 | $254.87 |
| $21 in 1956 | $253.92 |
| $21 in 1957 | $246.56 |
| $21 in 1958 | $239.62 |
| $21 in 1959 | $235.47 |
| $21 in 1960 | $231.47 |
| $21 in 1961 | $228.36 |
| $21 in 1962 | $226.84 |
| $21 in 1963 | $223.85 |
| $21 in 1964 | $220.23 |
| $21 in 1965 | $218.11 |
| $21 in 1966 | $214.00 |
| $21 in 1967 | $206.84 |
| $21 in 1968 | $200.74 |
| $21 in 1969 | $191.69 |
| $21 in 1970 | $180.51 |
| $21 in 1971 | $170.98 |
| $21 in 1972 | $165.58 |
| $21 in 1973 | $160.12 |
| $21 in 1974 | $147.30 |
| $21 in 1975 | $131.12 |
| $21 in 1976 | $122.62 |
| $21 in 1977 | $116.93 |
| $21 in 1978 | $109.58 |
| $21 in 1979 | $100.52 |
| $21 in 1980 | $88.72 |
| $21 in 1981 | $78.85 |
| $21 in 1982 | $72.40 |
| $21 in 1983 | $69.72 |
| $21 in 1984 | $67.18 |
| $21 in 1985 | $64.63 |
| $21 in 1986 | $62.26 |
| $21 in 1987 | $61.58 |
| $21 in 1988 | $58.97 |
| $21 in 1989 | $56.47 |
| $21 in Year | Value in 2026 |
| $21 in 1990 | $53.97 |
| $21 in 1991 | $50.86 |
| $21 in 1992 | $49.35 |
| $21 in 1993 | $47.96 |
| $21 in 1994 | $46.67 |
| $21 in 1995 | $45.46 |
| $21 in 1996 | $44.33 |
| $21 in 1997 | $42.91 |
| $21 in 1998 | $42.19 |
| $21 in 1999 | $41.52 |
| $21 in 2000 | $40.43 |
| $21 in 2001 | $39.11 |
| $21 in 2002 | $38.51 |
| $21 in 2003 | $37.62 |
| $21 in 2004 | $36.92 |
| $21 in 2005 | $35.76 |
| $21 in 2006 | $34.58 |
| $21 in 2007 | $33.72 |
| $21 in 2008 | $32.40 |
| $21 in 2009 | $32.37 |
| $21 in 2010 | $31.51 |
| $21 in 2011 | $31.05 |
| $21 in 2012 | $30.15 |
| $21 in 2013 | $29.64 |
| $21 in 2014 | $29.20 |
| $21 in 2015 | $28.98 |
| $21 in 2016 | $28.77 |
| $21 in 2017 | $28.19 |
| $21 in 2018 | $27.60 |
| $21 in 2019 | $27.09 |
| $21 in 2020 | $26.48 |
| $21 in 2021 | $26.13 |
| $21 in 2022 | $24.41 |
| $21 in 2023 | $22.93 |
| $21 in 2024 | $22.18 |
| $21 in 2025 | $21.56 |
| $21 in 2026 | $21.00 |