1851 -30 → 18211880 -29 → 18511850 +30 → 18801821 +29 → 18501791 +30 → 18211821 -30 → 17911851 -30 → 18211881 -30 → 18511851 +30 → 18811881 -30 → 18511911 -30 → 18811940 -29 → 19111969 -29 → 19401999 -30 → 19691969 +30 → 19991939 +30 → 19691968 -29 → 19391940 +28 → 19681970 -30 → 19402000 -30 → 19702029 -29 → 20002000 +29 → 20291971 +29 → 20002001 -30 → 19712031 -30 → 2001
