Number of birds found on the route for each year.
        A blank under the year indicates the route was not run that year.
        A zero under the year indicates the route was run and the species was not found.
Route   1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968
69007      0    0    0    0    0    0    0    0    1    0    0    0    1    0                                                                                                         
69010           1    0    0    0              0    0    0    0    0    0    0    0    0    0         0    0         0    0    0    0    0    0         0    0    0    0               
69049                                    0    0         0    0    0    1    0                                                                                                         
69136      0    4    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0                                                                           
69241      0    0                        1