It depends on how you define "full units with pike and shot"?
For example, Colonel Horn commands a regiment of Finnish infantry made up of 8 companies. According to Swedish regulations these 8 companies are to be used to form two infantry squadrons (a battalion sized unit) each with 4 companies and each squadron was supposed to have a ratio of pike to shot of 1:1. However due to losses Colonel Horn can only get a ratio 1 pike to 2 shot, otherwise the squadron is at regulation strenght (not counting commanded musketeers). In this case has Col. Horn failed to field "full units with pike and shot"?
The basic problem was that it was hard for units to recruit enough pikemen to reach the ratios of pike to shot laid down in regulations and/or contracts. And the ever present attrition on a campaign often made the problem even worse.
Take for example the Duke of Holstein's regiment of Imperial foot: link
On paper it should have fielded 1260 musketeers and 840 pikemen in 7 companies, yet it's actual strenght was 1361 musketeers and only 327 pikemen(!).
Faced with a shortage of pikemen the army commander could basicly do one of 3 things depending on the circumstances.
1. Accept a ratio that was lower than that laid down by the regulations as long as it was "good enough". I.e Bavarian regiments forming their battalions with a ratio of 1 pike to 2 shot instead of the 2 pike to 3 shot laid down in regulations.
2. Reform and combine units to bring the battlefield units closer to regulation strenght. I.e Swedish army before Breitenfeld when the original 8 brigades of infantry were reformed into 7 brigades in order to give each brigade a decent pike strenght. This of course left the army with a lot of surplus musketeers which were used to form large detachments of commanded shot attached to the cavalry wings as well as a vanguard of musketeers that acted as spearhead for the army's advance to the battlefield.
3. Take steps to increase the number of pikemen including forcing regimental commanders to rearm and retrain musketeers as pikemen while punishing any soldier who tried to convert himself from a pikeman to a musketeer. I.e the Imperial army in 1641 when army musters revealed that only 20% of the infantry was armed with pikes.
As for giving a average % for an entire decade that is not possible as the information available has way too many gaps. It is possible to provide "snap shots" of more focused information but even for the Swedes who were pretty obsessive about record keeping it is hard to provide continous information without gaps for longer periods of time. (And once Gustavus dies the gaps get more and more serious for the Swedes as well).
