Why end in 1943?

[SteamWake]

Originally Posted by reallydedpoet

Ships hit by U-boats in WWII

Ship losses by month

Click on the month to see list of all ships hit that month.
Each page has a map showing where the ships were attacked.

1939

Sep (53)Oct (37)Nov (30)Dec (47)167 ships hit in 1939.
1940

Jan (58)Feb (54)Mar (26)Apr (11)May (17)Jun (67)Jul (43)Aug (66)Sep (63)Oct (73)Nov (36)Dec (50)564 ships hit in 1940.
1941

Jan (15)Feb (47)Mar (50)Apr (48)May (66)Jun (65)Jul (21)Aug (32)Sep (60)Oct (51)Nov (17)Dec (28)500 ships hit in 1941.
1942

Jan (66)Feb (82)Mar (99)Apr (89)May (146)Jun (145)Jul (108)Aug (131)Sep (116)Oct (121)Nov (142)Dec (76)1321 ships hit in 1942.
1943

Jan (49)Feb (88)Mar (131)Apr (57)May (49)Jun (27)Jul (59)Aug (30)Sep (25)Oct (31)Nov (16)Dec (17)579 ships hit in 1943.
1944

Jan (20)Feb (28)Mar (22)Apr (12)May (17)Jun (22)Jul (27)Aug (37)Sep (15)Oct (10)Nov (11)Dec (25)246 ships hit in 1944.
1945

Jan (24)Feb (24)Mar (21)Apr (23)May (6)Jul (1)99 ships hit in 1945.

Note: The figures include all ships hit (sunk, damaged, captured etc.).

From uboat.net

Got one for uboats sunk for comparison?