Don't get your hopes up
RasputinLives Nico Rosberg hasn't actually shown any signs of wilting toward the end of championship seasons. When at Williams he may have struggled to get results as Williams struggled to keep up development of their car. But apart from that Nico has shown consistent season long performance, particularly last year compared to Lewis.
In 2013 Nico's end of season was stronger statistically and backs up my recollection of that period:
Lewis Hamilton: AUS 5, MAL 3, CHN 3, BHR 5, ESP 12, MON 4, CAN 3, GBR 4, GER 5,
HUN 1, BEL 3, ITA 9,
SIN 5, KOR 5, JPN Ret, IND 6, ABU 7, USA 4, BRA 9.
Nico Rosberg: AUS Ret, MAL 4, CHN Ret, BHR 9, ESP 6, MON 1, CAN 5, GBR 1, GER 9,
HUN 19, BEL 4, ITA 6,
SIN 4, KOR 7, JPN 8, IND 2, ABU 3, USA 9, BRA 5.
If any one, it is Lewis who has a tendency to have a drop off toward the end of seasons.