Number of Days Images Taken per Year
| Year | Average Images Per Day | Days | Days in Year | Percentage |
| 2009 | 1371.4038 | 312 | 313 | 99.7% |
| 2008 | 1150.0464 | 366 | 366 | 100.0% |
| 2007 | 882.6658 | 365 | 365 | 100.0% |
| 2006 | 555.7151 | 365 | 365 | 100.0% |
| 2005 | 254.4548 | 365 | 365 | 100.0% |
| 2004 | 53.5027 | 366 | 366 | 100.0% |
| 2003 | 30.7479 | 365 | 365 | 100.0% |
| 2002 | 18.0195 | 359 | 365 | 98.4% |
| 2001 | 10.5457 | 339 | 365 | 92.9% |
| 2000 | 7.6717 | 329 | 366 | 89.9% |
| 1999 | 5.9760 | 292 | 365 | 80.0% |
| 1998 | 3.7460 | 248 | 365 | 67.9% |
| 1997 | 3.4817 | 218 | 365 | 59.7% |
| 1996 | 4.4862 | 218 | 366 | 59.6% |
| 1995 | 3.8598 | 214 | 365 | 58.6% |
| 1994 | 3.1895 | 190 | 365 | 52.1% |
| 1993 | 3.9126 | 183 | 365 | 50.1% |
| 1992 | 4.4439 | 187 | 366 | 51.1% |
| 1991 | 3.7488 | 215 | 365 | 58.9% |
| 1990 | 5.0493 | 203 | 365 | 55.6% |
| 1989 | 3.8806 | 201 | 365 | 55.1% |
| 1988 | 3.9500 | 180 | 366 | 49.2% |
| 1987 | 3.6740 | 181 | 365 | 49.6% |
| 1986 | 3.0909 | 165 | 365 | 45.2% |
| 1985 | 2.6074 | 163 | 365 | 44.7% |
| 1984 | 2.9051 | 158 | 366 | 43.2% |
| 1983 | 3.6688 | 157 | 365 | 43.0% |
| 1982 | 2.8243 | 148 | 365 | 40.5% |
| 1981 | 3.0347 | 144 | 365 | 39.5% |
| 1980 | 3.1216 | 148 | 366 | 40.4% |
| 1979 | 4.1544 | 149 | 365 | 40.8% |
| 1978 | 3.3684 | 114 | 365 | 31.2% |
| 1977 | 4.0370 | 108 | 365 | 29.6% |
| 1976 | 3.2571 | 70 | 366 | 19.1% |
| 1975 | 2.0725 | 69 | 365 | 18.9% |
| 1974 | 3.1649 | 97 | 365 | 26.6% |
| 1973 | 2.8906 | 64 | 365 | 17.5% |
| 1972 | 2.5970 | 67 | 366 | 18.3% |
| 1971 | 2.8864 | 44 | 365 | 12.1% |
| 1970 | 2.0000 | 44 | 365 | 12.1% |
| 1969 | 2.6316 | 38 | 365 | 10.4% |
| 1968 | 2.2105 | 38 | 366 | 10.4% |
| 1967 | 1.9444 | 36 | 365 | 9.9% |
| 1966 | 1.7750 | 40 | 365 | 11.0% |
| 1965 | 1.4857 | 35 | 365 | 9.6% |
| 1964 | 1.6571 | 35 | 366 | 9.6% |
| 1963 | 1.4000 | 30 | 365 | 8.2% |
| 1962 | 3.4500 | 20 | 365 | 5.5% |
| 1961 | 2.2308 | 13 | 365 | 3.6% |
| 1960 | 3.5625 | 16 | 366 | 4.4% |
| 1959 | 4.2143 | 14 | 365 | 3.8% |
| 1958 | 1.1000 | 10 | 365 | 2.7% |
| 1957 | 2.3333 | 15 | 365 | 4.1% |
| 1956 | 1.5294 | 17 | 366 | 4.6% |
| 1955 | 2.2857 | 14 | 365 | 3.8% |
| 1954 | 1.0000 | 5 | 365 | 1.4% |
| 1953 | 1.4286 | 7 | 365 | 1.9% |
| 1952 | 1.0000 | 3 | 366 | 0.8% |
| 1951 | 1.6471 | 17 | 365 | 4.7% |
| 1950 | 1.3333 | 9 | 365 | 2.5% |
| 1949 | 1.3750 | 8 | 365 | 2.2% |
| 1948 | 2.0000 | 1 | 366 | 0.3% |
| 1947 | 2.0000 | 1 | 365 | 0.3% |
| 1946 | 1.0000 | 1 | 365 | 0.3% |
| 1945 | 1.0000 | 1 | 365 | 0.3% |
| 1943 | 1.0000 | 1 | 365 | 0.3% |
| 1940 | 1.0000 | 1 | 366 | 0.3% |
| 1938 | 2.0000 | 1 | 365 | 0.3% |
| 1937 | 1.0000 | 1 | 365 | 0.3% |
| 1933 | 1.0000 | 1 | 365 | 0.3% |
| 1931 | 1.0000 | 1 | 365 | 0.3% |
| 1930 | 2.0000 | 1 | 365 | 0.3% |
| 1927 | 1.0000 | 2 | 365 | 0.5% |
| 1926 | 1.0000 | 1 | 365 | 0.3% |
| 1925 | 1.0000 | 3 | 365 | 0.8% |
| 1920 | 1.5000 | 2 | 366 | 0.5% |
| 1918 | 1.0000 | 1 | 365 | 0.3% |
| 1917 | 1.0000 | 1 | 365 | 0.3% |
| 1911 | 2.0000 | 1 | 365 | 0.3% |
| 1910 | 1.0000 | 1 | 365 | 0.3% |
| 1908 | 1.0000 | 1 | 366 | 0.3% |
| 1903 | 1.0000 | 1 | 365 | 0.3% |
| 1900 | 1.0000 | 1 | 365 | 0.3% |
| 1891 | 1.0000 | 1 | 365 | 0.3% |
The Percentage column is the number of days in that year that we do have photos for (taking into account leap years ;)
